Vulnerability-Lookup

CVE-2026-23458 (GCVE-0-2026-23458)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-10-19 18:35

Title

netfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct() ctnetlink_dump_exp_ct() stores a conntrack pointer in cb->data for the netlink dump callback ctnetlink_exp_ct_dump_table(), but drops the conntrack reference immediately after netlink_dump_start(). When the dump spans multiple rounds, the second recvmsg() triggers the dump callback which dereferences the now-freed conntrack via nfct_help(ct), leading to a use-after-free on ct->ext. The bug is that the netlink_dump_control has no .start or .done callbacks to manage the conntrack reference across dump rounds. Other dump functions in the same file (e.g. ctnetlink_get_conntrack) properly use .start/.done callbacks for this purpose. Fix this by adding .start and .done callbacks that hold and release the conntrack reference for the duration of the dump, and move the nfct_help() call after the cb->args[0] early-return check in the dump callback to avoid dereferencing ct->ext unnecessarily. BUG: KASAN: slab-use-after-free in ctnetlink_exp_ct_dump_table+0x4f/0x2e0 Read of size 8 at addr ffff88810597ebf0 by task ctnetlink_poc/133 CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc Not tainted 7.0.0-rc2+ #3 PREEMPTLAZY Call Trace: <TASK> ctnetlink_exp_ct_dump_table+0x4f/0x2e0 netlink_dump+0x333/0x880 netlink_recvmsg+0x3e2/0x4b0 ? aa_sk_perm+0x184/0x450 sock_recvmsg+0xde/0xf0 Allocated by task 133: kmem_cache_alloc_noprof+0x134/0x440 __nf_conntrack_alloc+0xa8/0x2b0 ctnetlink_create_conntrack+0xa1/0x900 ctnetlink_new_conntrack+0x3cf/0x7d0 nfnetlink_rcv_msg+0x48e/0x510 netlink_rcv_skb+0xc9/0x1f0 nfnetlink_rcv+0xdb/0x220 netlink_unicast+0x3ec/0x590 netlink_sendmsg+0x397/0x690 __sys_sendmsg+0xf4/0x180 Freed by task 0: slab_free_after_rcu_debug+0xad/0x1e0 rcu_core+0x5c3/0x9c0

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 15:08 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

11 references

URL	Tags
https://git.kernel.org/stable/c/d8cd0efbccc5cfb0a…
https://git.kernel.org/stable/c/9821b47f669eb8279…
https://git.kernel.org/stable/c/bdf2724eefd4455a6…
https://git.kernel.org/stable/c/f04cc86d59906513d…
https://git.kernel.org/stable/c/f025171feef2ac656…
https://git.kernel.org/stable/c/04c8907ce4e3d3e26…
https://git.kernel.org/stable/c/cd541f15b60e22574…
https://git.kernel.org/stable/c/5cb81eeda909dbb2d…
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

11 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < d8cd0efbccc5cfb0a80da744a7da76e1333ab925 (git) Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < 9821b47f669eb82791fa0b1a6ebaf9aa219bea72 (git) Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < bdf2724eefd4455a66863abb025bab8d3aa98c57 (git) Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < f04cc86d59906513d2d62183b882966fc0ae0390 (git) Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < f025171feef2ac65663d7986f1d5ff0c28d6b2a9 (git) Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < 04c8907ce4e3d3e26c5e1a3e47aa5d17082cbb56 (git) Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < cd541f15b60e2257441398cf495d978f816d09f8 (git) Affected: e844a928431fa8f1359d1f4f2cef53d9b446bf52 , < 5cb81eeda909dbb2def209dd10636b51549a3f8a (git)	guessed
Linux	Linux	Affected: 3.10 Unaffected: 0 , < 3.10 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.20 , ≤ 6.18.* (semver) Unaffected: 6.19.10 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)	guessed
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)	guessed
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)	guessed
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.7 , < * (custom)	guessed
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)	guessed
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)	guessed
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.7 , < * (custom)	guessed
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)	guessed
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.5 , < * (custom)	guessed
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.7 , < * (custom)	guessed

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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()\n\nctnetlink_dump_exp_ct() stores a conntrack pointer in cb-\u003edata for the\nnetlink dump callback ctnetlink_exp_ct_dump_table(), but drops the\nconntrack reference immediately after netlink_dump_start().  When the\ndump spans multiple rounds, the second recvmsg() triggers the dump\ncallback which dereferences the now-freed conntrack via nfct_help(ct),\nleading to a use-after-free on ct-\u003eext.\n\nThe bug is that the netlink_dump_control has no .start or .done\ncallbacks to manage the conntrack reference across dump rounds.  Other\ndump functions in the same file (e.g. ctnetlink_get_conntrack) properly\nuse .start/.done callbacks for this purpose.\n\nFix this by adding .start and .done callbacks that hold and release the\nconntrack reference for the duration of the dump, and move the\nnfct_help() call after the cb-\u003eargs[0] early-return check in the dump\ncallback to avoid dereferencing ct-\u003eext unnecessarily.\n\n BUG: KASAN: slab-use-after-free in ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n Read of size 8 at addr ffff88810597ebf0 by task ctnetlink_poc/133\n\n CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc Not tainted 7.0.0-rc2+ #3 PREEMPTLAZY\n Call Trace:\n  \u003cTASK\u003e\n  ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n  netlink_dump+0x333/0x880\n  netlink_recvmsg+0x3e2/0x4b0\n  ? aa_sk_perm+0x184/0x450\n  sock_recvmsg+0xde/0xf0\n\n Allocated by task 133:\n  kmem_cache_alloc_noprof+0x134/0x440\n  __nf_conntrack_alloc+0xa8/0x2b0\n  ctnetlink_create_conntrack+0xa1/0x900\n  ctnetlink_new_conntrack+0x3cf/0x7d0\n  nfnetlink_rcv_msg+0x48e/0x510\n  netlink_rcv_skb+0xc9/0x1f0\n  nfnetlink_rcv+0xdb/0x220\n  netlink_unicast+0x3ec/0x590\n  netlink_sendmsg+0x397/0x690\n  __sys_sendmsg+0xf4/0x180\n\n Freed by task 0:\n  slab_free_after_rcu_debug+0xad/0x1e0\n  rcu_core+0x5c3/0x9c0"
        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "value": "AV:L - The vulnerable path is reached through a local NETLINK_NETFILTER ctnetlink request, specifically an expectation dump with CTA_EXPECT_MASTER. It is not reachable directly from unauthenticated network packets.\nAC:L - The attacker can create the relevant conntrack/expectation state, start the multipart dump, and free the master conntrack before the next recvmsg. No condition outside attacker control or difficult race is required.\nPR:L - nfnetlink requires CAP_NET_ADMIN, but the check is against the socket network namespace and is reachable by an unprivileged user via user and network namespaces. This makes the required privilege low rather than high.\nUI:N - Exploitation is driven entirely by attacker-issued netlink operations. No victim user action is required.\nS:U - The impact is within the kernel and the same local system security authority. This is a standard local kernel memory-corruption issue, not a cross-scope boundary escape such as guest-to-host.\nC:H - The bug is a use-after-free of a conntrack object and its extension pointer during a netlink dump. A freed kernel object can plausibly be reclaimed and shaped for information disclosure, so confidentiality impact is high.\nI:H - Use-after-free in kernel heap memory can plausibly be leveraged beyond a crash into memory corruption or control-flow manipulation. Following the required conservative scoring, integrity impact is high.\nA:H - The reported failure is a KASAN slab-use-after-free in kernel netlink dump handling and can cause an oops or panic. The attacker can trigger it repeatedly through local netlink requests."
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        },
        {
          "url": "https://git.kernel.org/stable/c/5cb81eeda909dbb2def209dd10636b51549a3f8a"
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      "title": "netfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()",
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    "dateReserved": "2026-01-13T15:37:46.021Z",
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()\n\nctnetlink_dump_exp_ct() stores a conntrack pointer in cb-\u003edata for the\nnetlink dump callback ctnetlink_exp_ct_dump_table(), but drops the\nconntrack reference immediately after netlink_dump_start().  When the\ndump spans multiple rounds, the second recvmsg() triggers the dump\ncallback which dereferences the now-freed conntrack via nfct_help(ct),\nleading to a use-after-free on ct-\u003eext.\n\nThe bug is that the netlink_dump_control has no .start or .done\ncallbacks to manage the conntrack reference across dump rounds.  Other\ndump functions in the same file (e.g. ctnetlink_get_conntrack) properly\nuse .start/.done callbacks for this purpose.\n\nFix this by adding .start and .done callbacks that hold and release the\nconntrack reference for the duration of the dump, and move the\nnfct_help() call after the cb-\u003eargs[0] early-return check in the dump\ncallback to avoid dereferencing ct-\u003eext unnecessarily.\n\n BUG: KASAN: slab-use-after-free in ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n Read of size 8 at addr ffff88810597ebf0 by task ctnetlink_poc/133\n\n CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc Not tainted 7.0.0-rc2+ #3 PREEMPTLAZY\n Call Trace:\n  \u003cTASK\u003e\n  ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n  netlink_dump+0x333/0x880\n  netlink_recvmsg+0x3e2/0x4b0\n  ? aa_sk_perm+0x184/0x450\n  sock_recvmsg+0xde/0xf0\n\n Allocated by task 133:\n  kmem_cache_alloc_noprof+0x134/0x440\n  __nf_conntrack_alloc+0xa8/0x2b0\n  ctnetlink_create_conntrack+0xa1/0x900\n  ctnetlink_new_conntrack+0x3cf/0x7d0\n  nfnetlink_rcv_msg+0x48e/0x510\n  netlink_rcv_skb+0xc9/0x1f0\n  nfnetlink_rcv+0xdb/0x220\n  netlink_unicast+0x3ec/0x590\n  netlink_sendmsg+0x397/0x690\n  __sys_sendmsg+0xf4/0x180\n\n Freed by task 0:\n  slab_free_after_rcu_debug+0xad/0x1e0\n  rcu_core+0x5c3/0x9c0"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnetfilter: ctnetlink: corrige uso despu\u00e9s de liberaci\u00f3n en ctnetlink_dump_exp_ct()\n\nctnetlink_dump_exp_ct() almacena un puntero conntrack en cb -\u003e data para la devoluci\u00f3n de llamada de volcado netlink ctnetlink_exp_ct_dump_table(), pero libera la referencia conntrack inmediatamente despu\u00e9s de netlink_dump_start(). Cuando el volcado abarca m\u00faltiples rondas, el segundo recvmsg() activa la devoluci\u00f3n de llamada de volcado que desreferencia el conntrack ahora liberado a trav\u00e9s de nfct_help(ct), lo que lleva a un uso despu\u00e9s de liberaci\u00f3n en ct -\u003e ext.\n\nEl error es que netlink_dump_control no tiene devoluciones de llamada .start o .done para gestionar la referencia conntrack a trav\u00e9s de las rondas de volcado. Otras funciones de volcado en el mismo archivo (p. ej., ctnetlink_get_conntrack) utilizan correctamente las devoluciones de llamada .start/.done para este prop\u00f3sito.\n\nSolucione esto a\u00f1adiendo devoluciones de llamada .start y .done que retienen y liberan la referencia conntrack durante la duraci\u00f3n del volcado, y mueva la llamada a nfct_help() despu\u00e9s de la comprobaci\u00f3n de retorno anticipado cb -\u003e args[0] en la devoluci\u00f3n de llamada de volcado para evitar desreferenciar ct -\u003e ext innecesariamente.\n\n ERROR: KASAN: uso despu\u00e9s de liberaci\u00f3n de slab en ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88810597ebf0 por la tarea ctnetlink_poc/133\n\n CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc No contaminado 7.0.0-rc2+ #3 PREEMPTLAZY\n Traza de Llamada:\n  \u003cTAREA\u003e\n  ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n  netlink_dump+0x333/0x880\n  netlink_recvmsg+0x3e2/0x4b0\n  ? aa_sk_perm+0x184/0x450\n  sock_recvmsg+0xde/0xf0\n\n Asignado por la tarea 133:\n  kmem_cache_alloc_noprof+0x134/0x440\n  __nf_conntrack_alloc+0xa8/0x2b0\n  ctnetlink_create_conntrack+0xa1/0x900\n  ctnetlink_new_conntrack+0x3cf/0x7d0\n  nfnetlink_rcv_msg+0x48e/0x510\n  netlink_rcv_skb+0xc9/0x1f0\n  nfnetlink_rcv+0xdb/0x220\n  netlink_unicast+0x3ec/0x590\n  netlink_sendmsg+0x397/0x690\n  __sys_sendmsg+0xf4/0x180\n\n Liberado por la tarea 0:\n  slab_free_after_rcu_debug+0xad/0x1e0\n  rcu_core+0x5c3/0x9c0"
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        "id": "CVE-2026-23458",
        "lastModified": "2026-10-19T19:17:49.877",
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        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-23458",
        "datePublished": "2026-04-03T15:15:39.041Z",
        "dateReserved": "2026-01-13T15:37:46.021Z",
        "dateUpdated": "2026-10-19T18:35:45.043Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

OESA-2026-2176 (CVE-2025-27558)

Vulnerability from osv_openeuler – Published: 2026-05-03 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

kernel security update

Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

IEEE P802.11-REVme D1.1 through D7.0 allows FragAttacks against mesh networks. In mesh networks using Wi-Fi Protected Access (WPA, WPA2, or WPA3) or Wired Equivalent Privacy (WEP), an adversary can exploit this vulnerability to inject arbitrary frames towards devices that support receiving non-SSP A-MSDU frames. NOTE: this issue exists because of an incorrect fix for CVE-2020-24588. P802.11-REVme, as of early 2025, is a planned release of the 802.11 standard.(CVE-2025-27558)

In the Linux kernel, a security vulnerability exists in the IOMMU Shared Virtual Addressing (SVA) feature. On x86 architecture when CONFIG_X86 is set, IOMMU hardware caches kernel page table entries. Due to the lack of notification mechanism for kernel page table changes, when kernel page table pages are freed and reused, the IOMMU may retain stale entries, leading to Use-After-Free (UAF) and Write-After-Free (WAF) conditions. This can be exploited to cause arbitrary physical memory DMA access or privilege escalation.(CVE-2025-71089)

In the Linux kernel, the following vulnerability has been resolved:

uacce: fix cdev handling in the cleanup path

When cdev_device_add fails, it internally releases the cdev memory, and if cdev_device_del is then executed, it will cause a hang error. To fix it, we check the return value of cdev_device_add() and clear uacce->cdev to avoid calling cdev_device_del in the uacce_remove.(CVE-2026-23096)

In the Linux kernel, the following vulnerability has been resolved:

net/sched: act_ife: Fix metalist update behavior

Whenever an ife action replace changes the metalist, instead of replacing the old data on the metalist, the current ife code is appending the new metadata. Aside from being innapropriate behavior, this may lead to an unbounded addition of metadata to the metalist which might cause an out of bounds error when running the encode op:

[ 138.423369][ C1] ================================================================== [ 138.424317][ C1] BUG: KASAN: slab-out-of-bounds in ife_tlv_meta_encode (net/ife/ife.c:168) [ 138.424906][ C1] Write of size 4 at addr ffff8880077f4ffe by task ife_out_out_bou/255 [ 138.425778][ C1] CPU: 1 UID: 0 PID: 255 Comm: ife_out_out_bou Not tainted 7.0.0-rc1-00169-gfbdfa8da05b6 #624 PREEMPT(full) [ 138.425795][ C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 138.425800][ C1] Call Trace: [ 138.425804][ C1] <IRQ> [ 138.425808][ C1] dump_stack_lvl (lib/dump_stack.c:122) [ 138.425828][ C1] print_report (mm/kasan/report.c:379 mm/kasan/report.c:482) [ 138.425839][ C1] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) [ 138.425844][ C1] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:95 (discriminator 1) ./include/linux/rcupdate.h:975 (discriminator 1) ./include/linux/mmzone.h:2207 (discriminator 1) arch/x86/mm/physaddr.c:54 (discriminator 1)) [ 138.425853][ C1] ? ife_tlv_meta_encode (net/ife/ife.c:168) [ 138.425859][ C1] kasan_report (mm/kasan/report.c:221 mm/kasan/report.c:597) [ 138.425868][ C1] ? ife_tlv_meta_encode (net/ife/ife.c:168) [ 138.425878][ C1] kasan_check_range (mm/kasan/generic.c:186 (discriminator 1) mm/kasan/generic.c:200 (discriminator 1)) [ 138.425884][ C1] __asan_memset (mm/kasan/shadow.c:84 (discriminator 2)) [ 138.425889][ C1] ife_tlv_meta_encode (net/ife/ife.c:168) [ 138.425893][ C1] ? ife_tlv_meta_encode (net/ife/ife.c:171) [ 138.425898][ C1] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) [ 138.425903][ C1] ife_encode_meta_u16 (net/sched/act_ife.c:57) [ 138.425910][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 138.425916][ C1] ? __asan_memcpy (mm/kasan/shadow.c:105 (discriminator 3)) [ 138.425921][ C1] ? __pfx_ife_encode_meta_u16 (net/sched/act_ife.c:45) [ 138.425927][ C1] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) [ 138.425931][ C1] tcf_ife_act (net/sched/act_ife.c:847 net/sched/act_ife.c:879)

To solve this issue, fix the replace behavior by adding the metalist to the ife rcu data structure.(CVE-2026-23378)

In the Linux kernel, the following vulnerability has been resolved:

icmp: fix NULL pointer dereference in icmp_tag_validation()

icmp_tag_validation() unconditionally dereferences the result of rcu_dereference(inet_protos[proto]) without checking for NULL. The inet_protos[] array is sparse -- only about 15 of 256 protocol numbers have registered handlers. When ip_no_pmtu_disc is set to 3 (hardened PMTU mode) and the kernel receives an ICMP Fragmentation Needed error with a quoted inner IP header containing an unregistered protocol number, the NULL dereference causes a kernel panic in softirq context.

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] RIP: 0010:icmp_unreach (net/ipv4/icmp.c:1085 net/ipv4/icmp.c:1143) Call Trace: <IRQ> icmp_rcv (net/ipv4/icmp.c:1527) ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207) ip_local_deliver_finish (net/ipv4/ip_input.c:242) ip_local_deliver (net/ipv4/ip_input.c:262) ip_rcv (net/ipv4/ip_input.c:573) __netif_receive_skb_one_core (net/core/dev.c:6164) process_backlog (net/core/dev.c:6628) handle_softirqs (kernel/softirq.c:561) </IRQ>

Add a NULL check before accessing icmp_strict_tag_validation. If the protocol has no registered handler, return false since it cannot perform strict tag validation.(CVE-2026-23398)

In the Linux kernel, the following vulnerability has been resolved:

apparmor: fix side-effect bug in match_char() macro usage

The match_char() macro evaluates its character parameter multiple times when traversing differential encoding chains. When invoked with *str++, the string pointer advances on each iteration of the inner do-while loop, causing the DFA to check different characters at each iteration and therefore skip input characters. This results in out-of-bounds reads when the pointer advances past the input buffer boundary.

[ 94.984676] ================================================================== [ 94.985301] BUG: KASAN: slab-out-of-bounds in aa_dfa_match+0x5ae/0x760 [ 94.985655] Read of size 1 at addr ffff888100342000 by task file/976

[ 94.986319] CPU: 7 UID: 1000 PID: 976 Comm: file Not tainted 6.19.0-rc7-next-20260127 #1 PREEMPT(lazy) [ 94.986322] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 94.986329] Call Trace: [ 94.986341] <TASK> [ 94.986347] dump_stack_lvl+0x5e/0x80 [ 94.986374] print_report+0xc8/0x270 [ 94.986384] ? aa_dfa_match+0x5ae/0x760 [ 94.986388] kasan_report+0x118/0x150 [ 94.986401] ? aa_dfa_match+0x5ae/0x760 [ 94.986405] aa_dfa_match+0x5ae/0x760 [ 94.986408] __aa_path_perm+0x131/0x400 [ 94.986418] aa_path_perm+0x219/0x2f0 [ 94.986424] apparmor_file_open+0x345/0x570 [ 94.986431] security_file_open+0x5c/0x140 [ 94.986442] do_dentry_open+0x2f6/0x1120 [ 94.986450] vfs_open+0x38/0x2b0 [ 94.986453] ? may_open+0x1e2/0x2b0 [ 94.986466] path_openat+0x231b/0x2b30 [ 94.986469] ? __x64_sys_openat+0xf8/0x130 [ 94.986477] do_file_open+0x19d/0x360 [ 94.986487] do_sys_openat2+0x98/0x100 [ 94.986491] __x64_sys_openat+0xf8/0x130 [ 94.986499] do_syscall_64+0x8e/0x660 [ 94.986515] ? count_memcg_events+0x15f/0x3c0 [ 94.986526] ? srso_alias_return_thunk+0x5/0xfbef5 [ 94.986540] ? handle_mm_fault+0x1639/0x1ef0 [ 94.986551] ? vma_start_read+0xf0/0x320 [ 94.986558] ? srso_alias_return_thunk+0x5/0xfbef5 [ 94.986561] ? srso_alias_return_thunk+0x5/0xfbef5 [ 94.986563] ? fpregs_assert_state_consistent+0x50/0xe0 [ 94.986572] ? srso_alias_return_thunk+0x5/0xfbef5 [ 94.986574] ? arch_exit_to_user_mode_prepare+0x9/0xb0 [ 94.986587] ? srso_alias_return_thunk+0x5/0xfbef5 [ 94.986588] ? irqentry_exit+0x3c/0x590 [ 94.986595] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 94.986597] RIP: 0033:0x7fda4a79c3ea

Fix by extracting the character value before invoking match_char, ensuring single evaluation per outer loop.(CVE-2026-23406)

In the Linux kernel, the following vulnerability has been resolved:

apparmor: fix missing bounds check on DEFAULT table in verify_dfa()

The verify_dfa() function only checks DEFAULT_TABLE bounds when the state is not differentially encoded.

When the verification loop traverses the differential encoding chain, it reads k = DEFAULT_TABLE[j] and uses k as an array index without validation. A malformed DFA with DEFAULT_TABLE[j] >= state_count, therefore, causes both out-of-bounds reads and writes.

[ 57.179855] ================================================================== [ 57.180549] BUG: KASAN: slab-out-of-bounds in verify_dfa+0x59a/0x660 [ 57.180904] Read of size 4 at addr ffff888100eadec4 by task su/993

[ 57.181554] CPU: 1 UID: 0 PID: 993 Comm: su Not tainted 6.19.0-rc7-next-20260127 #1 PREEMPT(lazy) [ 57.181558] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 57.181563] Call Trace: [ 57.181572] <TASK> [ 57.181577] dump_stack_lvl+0x5e/0x80 [ 57.181596] print_report+0xc8/0x270 [ 57.181605] ? verify_dfa+0x59a/0x660 [ 57.181608] kasan_report+0x118/0x150 [ 57.181620] ? verify_dfa+0x59a/0x660 [ 57.181623] verify_dfa+0x59a/0x660 [ 57.181627] aa_dfa_unpack+0x1610/0x1740 [ 57.181629] ? __kmalloc_cache_noprof+0x1d0/0x470 [ 57.181640] unpack_pdb+0x86d/0x46b0 [ 57.181647] ? srso_alias_return_thunk+0x5/0xfbef5 [ 57.181653] ? srso_alias_return_thunk+0x5/0xfbef5 [ 57.181656] ? aa_unpack_nameX+0x1a8/0x300 [ 57.181659] aa_unpack+0x20b0/0x4c30 [ 57.181662] ? srso_alias_return_thunk+0x5/0xfbef5 [ 57.181664] ? stack_depot_save_flags+0x33/0x700 [ 57.181681] ? kasan_save_track+0x4f/0x80 [ 57.181683] ? kasan_save_track+0x3e/0x80 [ 57.181686] ? __kasan_kmalloc+0x93/0xb0 [ 57.181688] ? __kvmalloc_node_noprof+0x44a/0x780 [ 57.181693] ? aa_simple_write_to_buffer+0x54/0x130 [ 57.181697] ? policy_update+0x154/0x330 [ 57.181704] aa_replace_profiles+0x15a/0x1dd0 [ 57.181707] ? srso_alias_return_thunk+0x5/0xfbef5 [ 57.181710] ? __kvmalloc_node_noprof+0x44a/0x780 [ 57.181712] ? aa_loaddata_alloc+0x77/0x140 [ 57.181715] ? srso_alias_return_thunk+0x5/0xfbef5 [ 57.181717] ? _copy_from_user+0x2a/0x70 [ 57.181730] policy_update+0x17a/0x330 [ 57.181733] profile_replace+0x153/0x1a0 [ 57.181735] ? rw_verify_area+0x93/0x2d0 [ 57.181740] vfs_write+0x235/0xab0 [ 57.181745] ksys_write+0xb0/0x170 [ 57.181748] do_syscall_64+0x8e/0x660 [ 57.181762] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 57.181765] RIP: 0033:0x7f6192792eb2

Remove the MATCH_FLAG_DIFF_ENCODE condition to validate all DEFAULT_TABLE entries unconditionally.(CVE-2026-23407)

In the Linux kernel, the following vulnerability has been resolved:

ipv6: add NULL checks for idev in SRv6 paths

__in6_dev_get() can return NULL when the device has no IPv6 configuration (e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER).

Add NULL checks for idev returned by __in6_dev_get() in both seg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL pointer dereferences.(CVE-2026-23442)

In the Linux kernel, the following vulnerability has been resolved:

net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check

The same bounds-check bug fixed for NDP16 in the previous patch also exists in cdc_ncm_rx_verify_ndp32(). The DPE array size is validated against the total skb length without accounting for ndpoffset, allowing out-of-bounds reads when the NDP32 is placed near the end of the NTB.

Add ndpoffset to the nframes bounds check and use struct_size_t() to express the NDP-plus-DPE-array size more clearly.

Compile-tested only.(CVE-2026-23447)

In the Linux kernel, the following vulnerability has been resolved:

net/sched: teql: Fix double-free in teql_master_xmit

Whenever a TEQL devices has a lockless Qdisc as root, qdisc_reset should be called using the seq_lock to avoid racing with the datapath. Failure to do so may cause crashes like the following:

[ 238.028993][ T318] BUG: KASAN: double-free in skb_release_data (net/core/skbuff.c:1139) [ 238.029328][ T318] Free of addr ffff88810c67ec00 by task poc_teql_uaf_ke/318 [ 238.029749][ T318] [ 238.029900][ T318] CPU: 3 UID: 0 PID: 318 Comm: poc_teql_ke Not tainted 7.0.0-rc3-00149-ge5b31d988a41 #704 PREEMPT(full) [ 238.029906][ T318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 238.029910][ T318] Call Trace: [ 238.029913][ T318] <TASK> [ 238.029916][ T318] dump_stack_lvl (lib/dump_stack.c:122) [ 238.029928][ T318] print_report (mm/kasan/report.c:379 mm/kasan/report.c:482) [ 238.029940][ T318] ? skb_release_data (net/core/skbuff.c:1139) [ 238.029944][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) ... [ 238.029957][ T318] ? skb_release_data (net/core/skbuff.c:1139) [ 238.029969][ T318] kasan_report_invalid_free (mm/kasan/report.c:221 mm/kasan/report.c:563) [ 238.029979][ T318] ? skb_release_data (net/core/skbuff.c:1139) [ 238.029989][ T318] check_slab_allocation (mm/kasan/common.c:231) [ 238.029995][ T318] kmem_cache_free (mm/slub.c:2637 (discriminator 1) mm/slub.c:6168 (discriminator 1) mm/slub.c:6298 (discriminator 1)) [ 238.030004][ T318] skb_release_data (net/core/skbuff.c:1139) ... [ 238.030025][ T318] sk_skb_reason_drop (net/core/skbuff.c:1256) [ 238.030032][ T318] pfifo_fast_reset (./include/linux/ptr_ring.h:171 ./include/linux/ptr_ring.h:309 ./include/linux/skb_array.h:98 net/sched/sch_generic.c:827) [ 238.030039][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) ... [ 238.030054][ T318] qdisc_reset (net/sched/sch_generic.c:1034) [ 238.030062][ T318] teql_destroy (./include/linux/spinlock.h:395 net/sched/sch_teql.c:157) [ 238.030071][ T318] __qdisc_destroy (./include/net/pkt_sched.h:328 net/sched/sch_generic.c:1077) [ 238.030077][ T318] qdisc_graft (net/sched/sch_api.c:1062 net/sched/sch_api.c:1053 net/sched/sch_api.c:1159) [ 238.030089][ T318] ? __pfx_qdisc_graft (net/sched/sch_api.c:1091) [ 238.030095][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) [ 238.030102][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) [ 238.030106][ T318] ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221) [ 238.030114][ T318] tc_get_qdisc (net/sched/sch_api.c:1529 net/sched/sch_api.c:1556) ... [ 238.072958][ T318] Allocated by task 303 on cpu 5 at 238.026275s: [ 238.073392][ T318] kasan_save_stack (mm/kasan/common.c:58) [ 238.073884][ T318] kasan_save_track (mm/kasan/common.c:64 (discriminator 5) mm/kasan/common.c:79 (discriminator 5)) [ 238.074230][ T318] __kasan_slab_alloc (mm/kasan/common.c:369) [ 238.074578][ T318] kmem_cache_alloc_node_noprof (./include/linux/kasan.h:253 mm/slub.c:4542 mm/slub.c:4869 mm/slub.c:4921) [ 238.076091][ T318] kmalloc_reserve (net/core/skbuff.c:616 (discriminator 107)) [ 238.076450][ T318] __alloc_skb (net/core/skbuff.c:713) [ 238.076834][ T318] alloc_skb_with_frags (./include/linux/skbuff.h:1383 net/core/skbuff.c:6763) [ 238.077178][ T318] sock_alloc_send_pskb (net/core/sock.c:2997) [ 238.077520][ T318] packet_sendmsg (net/packet/af_packet.c:2926 net/packet/af_packet.c:3019 net/packet/af_packet.c:3108) [ 238.081469][ T318] [ 238.081870][ T318] Freed by task 299 on cpu 1 at 238.028496s: [ 238.082761][ T318] kasan_save_stack (mm/kasan/common.c:58) [ 238.083481][ T318] kasan_save_track (mm/kasan/common.c:64 (discriminator 5) mm/kasan/common.c:79 (discriminator 5)) [ 238.085348][ T318] kasan_save_free_info (mm/kasan/generic.c:587 (discriminator 1)) [ 238.085900][ T318] __kasan_slab_free (mm/ ---truncated---(CVE-2026-23449)

In the Linux kernel, the following vulnerability has been resolved:

PM: runtime: Fix a race condition related to device removal

The following code in pm_runtime_work() may dereference the dev->parent pointer after the parent device has been freed:

/* Maybe the parent is now able to suspend. */
if (parent &amp;&amp; !parent-&gt;power.ignore_children) {
    spin_unlock(&amp;dev-&gt;power.lock);

    spin_lock(&amp;parent-&gt;power.lock);
    rpm_idle(parent, RPM_ASYNC);
    spin_unlock(&amp;parent-&gt;power.lock);

    spin_lock(&amp;dev-&gt;power.lock);
}

Fix this by inserting a flush_work() call in pm_runtime_remove().

Without this patch blktest block/001 triggers the following complaint sporadically:

BUG: KASAN: slab-use-after-free in lock_acquire+0x70/0x160 Read of size 1 at addr ffff88812bef7198 by task kworker/u553:1/3081 Workqueue: pm pm_runtime_work Call Trace: <TASK> dump_stack_lvl+0x61/0x80 print_address_description.constprop.0+0x8b/0x310 print_report+0xfd/0x1d7 kasan_report+0xd8/0x1d0 __kasan_check_byte+0x42/0x60 lock_acquire.part.0+0x38/0x230 lock_acquire+0x70/0x160 _raw_spin_lock+0x36/0x50 rpm_suspend+0xc6a/0xfe0 rpm_idle+0x578/0x770 pm_runtime_work+0xee/0x120 process_one_work+0xde3/0x1410 worker_thread+0x5eb/0xfe0 kthread+0x37b/0x480 ret_from_fork+0x6cb/0x920 ret_from_fork_asm+0x11/0x20 </TASK>

Allocated by task 4314: kasan_save_stack+0x2a/0x50 kasan_save_track+0x18/0x40 kasan_save_alloc_info+0x3d/0x50 __kasan_kmalloc+0xa0/0xb0 __kmalloc_noprof+0x311/0x990 scsi_alloc_target+0x122/0xb60 [scsi_mod] __scsi_scan_target+0x101/0x460 [scsi_mod] scsi_scan_channel+0x179/0x1c0 [scsi_mod] scsi_scan_host_selected+0x259/0x2d0 [scsi_mod] store_scan+0x2d2/0x390 [scsi_mod] dev_attr_store+0x43/0x80 sysfs_kf_write+0xde/0x140 kernfs_fop_write_iter+0x3ef/0x670 vfs_write+0x506/0x1470 ksys_write+0xfd/0x230 __x64_sys_write+0x76/0xc0 x64_sys_call+0x213/0x1810 do_syscall_64+0xee/0xfc0 entry_SYSCALL_64_after_hwframe+0x4b/0x53

Freed by task 4314: kasan_save_stack+0x2a/0x50 kasan_save_track+0x18/0x40 kasan_save_free_info+0x3f/0x50 __kasan_slab_free+0x67/0x80 kfree+0x225/0x6c0 scsi_target_dev_release+0x3d/0x60 [scsi_mod] device_release+0xa3/0x220 kobject_cleanup+0x105/0x3a0 kobject_put+0x72/0xd0 put_device+0x17/0x20 scsi_device_dev_release+0xacf/0x12c0 [scsi_mod] device_release+0xa3/0x220 kobject_cleanup+0x105/0x3a0 kobject_put+0x72/0xd0 put_device+0x17/0x20 scsi_device_put+0x7f/0xc0 [scsi_mod] sdev_store_delete+0xa5/0x120 [scsi_mod] dev_attr_store+0x43/0x80 sysfs_kf_write+0xde/0x140 kernfs_fop_write_iter+0x3ef/0x670 vfs_write+0x506/0x1470 ksys_write+0xfd/0x230 __x64_sys_write+0x76/0xc0 x64_sys_call+0x213/0x1810(CVE-2026-23452)

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()

In DecodeQ931(), the UserUserIE code path reads a 16-bit length from the packet, then decrements it by 1 to skip the protocol discriminator byte before passing it to DecodeH323_UserInformation(). If the encoded length is 0, the decrement wraps to -1, which is then passed as a large value to the decoder, leading to an out-of-bounds read.

Add a check to ensure len is positive after the decrement.(CVE-2026-23455)

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case

In decode_int(), the CONS case calls get_bits(bs, 2) to read a length value, then calls get_uint(bs, len) without checking that len bytes remain in the buffer. The existing boundary check only validates the 2 bits for get_bits(), not the subsequent 1-4 bytes that get_uint() reads. This allows a malformed H.323/RAS packet to cause a 1-4 byte slab-out-of-bounds read.

Add a boundary check for len bytes after get_bits() and before get_uint().(CVE-2026-23456)

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp()

sip_help_tcp() parses the SIP Content-Length header with simple_strtoul(), which returns unsigned long, but stores the result in unsigned int clen. On 64-bit systems, values exceeding UINT_MAX are silently truncated before computing the SIP message boundary.

For example, Content-Length 4294967328 (2^32 + 32) is truncated to 32, causing the parser to miscalculate where the current message ends. The loop then treats trailing data in the TCP segment as a second SIP message and processes it through the SDP parser.

Fix this by changing clen to unsigned long to match the return type of simple_strtoul(), and reject Content-Length values that exceed the remaining TCP payload length.(CVE-2026-23457)

In the Linux kernel, the following vulnerability has been resolved:

netfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()

ctnetlink_dump_exp_ct() stores a conntrack pointer in cb->data for the netlink dump callback ctnetlink_exp_ct_dump_table(), but drops the conntrack reference immediately after netlink_dump_start(). When the dump spans multiple rounds, the second recvmsg() triggers the dump callback which dereferences the now-freed conntrack via nfct_help(ct), leading to a use-after-free on ct->ext.

The bug is that the netlink_dump_control has no .start or .done callbacks to manage the conntrack reference across dump rounds. Other dump functions in the same file (e.g. ctnetlink_get_conntrack) properly use .start/.done callbacks for this purpose.

Fix this by adding .start and .done callbacks that hold and release the conntrack reference for the duration of the dump, and move the nfct_help() call after the cb->args[0] early-return check in the dump callback to avoid dereferencing ct->ext unnecessarily.

BUG: KASAN: slab-use-after-free in ctnetlink_exp_ct_dump_table+0x4f/0x2e0 Read of size 8 at addr ffff88810597ebf0 by task ctnetlink_poc/133

CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc Not tainted 7.0.0-rc2+ #3 PREEMPTLAZY Call Trace: <TASK> ctnetlink_exp_ct_dump_table+0x4f/0x2e0 netlink_dump+0x333/0x880 netlink_recvmsg+0x3e2/0x4b0 ? aa_sk_perm+0x184/0x450 sock_recvmsg+0xde/0xf0

Allocated by task 133: kmem_cache_alloc_noprof+0x134/0x440 __nf_conntrack_alloc+0xa8/0x2b0 ctnetlink_create_conntrack+0xa1/0x900 ctnetlink_new_conntrack+0x3cf/0x7d0 nfnetlink_rcv_msg+0x48e/0x510 netlink_rcv_skb+0xc9/0x1f0 nfnetlink_rcv+0xdb/0x220 netlink_unicast+0x3ec/0x590 netlink_sendmsg+0x397/0x690 __sys_sendmsg+0xf4/0x180

Freed by task 0: slab_free_after_rcu_debug+0xad/0x1e0 rcu_core+0x5c3/0x9c0(CVE-2026-23458)

In the Linux kernel, the following vulnerability has been resolved:

spi: fix statistics allocation

The controller per-cpu statistics is not allocated until after the controller has been registered with driver core, which leaves a window where accessing the sysfs attributes can trigger a NULL-pointer dereference.

Fix this by moving the statistics allocation to controller allocation while tying its lifetime to that of the controller (rather than using implicit devres).(CVE-2026-23475)

In the Linux kernel, the following vulnerability has been resolved:

spi: fix use-after-free on controller registration failure

Make sure to deregister from driver core also in the unlikely event that per-cpu statistics allocation fails during controller registration to avoid use-after-free (of driver resources) and unclocked register accesses.(CVE-2026-31389)

In the Linux kernel, the following vulnerability has been resolved:

ipv6: avoid overflows in ip6_datagram_send_ctl()

Yiming Qian reported : <quote> I believe I found a locally triggerable kernel bug in the IPv6 sendmsg ancillary-data path that can panic the kernel via skb_under_panic() (local DoS).

The core issue is a mismatch between:

a 16-bit length accumulator (struct ipv6_txoptions::opt_flen, type __u16) and
a pointer to the last provided destination-options header (opt->dst1opt)

when multiple IPV6_DSTOPTS control messages (cmsgs) are provided.

include/net/ipv6.h:
struct ipv6_txoptions::opt_flen is __u16 (wrap possible). (lines 291-307, especially 298)
net/ipv6/datagram.c:ip6_datagram_send_ctl():
Accepts repeated IPV6_DSTOPTS and accumulates into opt_flen without rejecting duplicates. (lines 909-933)
net/ipv6/ip6_output.c:__ip6_append_data():
Uses opt->opt_flen + opt->opt_nflen to compute header sizes/headroom decisions. (lines 1448-1466, especially 1463-1465)
net/ipv6/ip6_output.c:__ip6_make_skb():
Calls ipv6_push_frag_opts() if opt->opt_flen is non-zero. (lines 1930-1934)
net/ipv6/exthdrs.c:ipv6_push_frag_opts() / ipv6_push_exthdr():
Push size comes from ipv6_optlen(opt->dst1opt) (based on the pointed-to header). (lines 1179-1185 and 1206-1211)
opt_flen is a 16-bit accumulator:
include/net/ipv6.h:298 defines __u16 opt_flen; /* after fragment hdr */.
ip6_datagram_send_ctl() accepts repeated IPV6_DSTOPTS cmsgs and increments opt_flen each time:
In net/ipv6/datagram.c:909-933, for IPV6_DSTOPTS:
It computes len = ((hdr->hdrlen + 1) << 3);
It checks CAP_NET_RAW using ns_capable(net->user_ns, CAP_NET_RAW). (line 922)
Then it does:
- opt->opt_flen += len; (line 927)
- opt->dst1opt = hdr; (line 928)

There is no duplicate rejection here (unlike the legacy IPV6_2292DSTOPTS path which rejects duplicates at net/ipv6/datagram.c:901-904).

If enough large IPV6_DSTOPTS cmsgs are provided, opt_flen wraps while dst1opt still points to a large (2048-byte) destination-options header.

In the attached PoC (poc.c):

32 cmsgs with hdrlen=255 => len = (255+1)*8 = 2048
1 cmsg with hdrlen=0 => len = 8
Total increment: 32*2048 + 8 = 65544, so (__u16)opt_flen == 8
The last cmsg is 2048 bytes, so dst1opt points to a 2048-byte header.
The transmit path sizes headers using the wrapped opt_flen:
In net/ipv6/ip6_output.c:1463-1465:
headersize = sizeof(struct ipv6hdr) + (opt ? opt->opt_flen + opt->opt_nflen : 0) + ...;

With wrapped opt_flen, headersize/headroom decisions underestimate what will be pushed later.

When building the final skb, the actual push length comes from dst1opt and is not limited by wrapped opt_flen:
In net/ipv6/ip6_output.c:1930-1934:
if (opt->opt_flen) proto = ipv6_push_frag_opts(skb, opt, proto);
In net/ipv6/exthdrs.c:1206-1211, ipv6_push_frag_opts() pushes dst1opt via ipv6_push_exthdr().
In net/ipv6/exthdrs.c:1179-1184, ipv6_push_exthdr() does:
skb_push(skb, ipv6_optlen(opt));
memcpy(h, opt, ipv6_optlen(opt));

With insufficient headroom, skb_push() underflows and triggers skb_under_panic() -> BUG():

net/core/skbuff.c:2669-2675 (skb_push() calls skb_under_panic())
net/core/skbuff.c:207-214 (skb_panic() ends in BUG())
The IPV6_DSTOPTS cmsg path requires CAP_NET_RAW in the target netns user namespace (ns_capable(net->user_ns, CAP_NET_RAW)).
Root (or any task with CAP_NET_RAW) can trigger this without user namespaces.
An unprivileged uid=1000 user can trigger this if unprivileged user namespaces are enabled and it can create a userns+netns to obtain namespaced CAP_NET_RAW (the attached PoC does this).
Local denial of service: kernel BUG/panic (system crash). - ---truncated---(CVE-2026-31415)

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nfnetlink_log: account for netlink header size

This is a followup to an old bug fix: NLMSG_DONE needs to account for the netlink header size, not just the attribute size.

This can result in a WARN splat + drop of the netlink message, but other than this there are no ill effects.(CVE-2026-31416)

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conntrack_sip: fix use of uninitialized rtp_addr in process_sdp

process_sdp() declares union nf_inet_addr rtp_addr on the stack and passes it to the nf_nat_sip sdp_session hook after walking the SDP media descriptions. However rtp_addr is only initialized inside the media loop when a recognized media type with a non-zero port is found.

If the SDP body contains no m= lines, only inactive media sections (m=audio 0 ...) or only unrecognized media types, rtp_addr is never assigned. Despite that, the function still calls hooks->sdp_session() with &rtp_addr, causing nf_nat_sdp_session() to format the stale stack value as an IP address and rewrite the SDP session owner and connection lines with it.

With CONFIG_INIT_STACK_ALL_ZERO (default on most distributions) this results in the session-level o= and c= addresses being rewritten to 0.0.0.0 for inactive SDP sessions. Without stack auto-init the rewritten address is whatever happened to be on the stack.

Fix this by pre-initializing rtp_addr from the session-level connection address (caddr) when available, and tracking via a have_rtp_addr flag whether any valid address was established. Skip the sdp_session hook entirely when no valid address exists.(CVE-2026-31427)

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD

__build_packet_message() manually constructs the NFULA_PAYLOAD netlink attribute using skb_put() and skb_copy_bits(), bypassing the standard nla_reserve()/nla_put() helpers. While nla_total_size(data_len) bytes are allocated (including NLA alignment padding), only data_len bytes of actual packet data are copied. The trailing nla_padlen(data_len) bytes (1-3 when data_len is not 4-byte aligned) are never initialized, leaking stale heap contents to userspace via the NFLOG netlink socket.

Replace the manual attribute construction with nla_reserve(), which handles the tailroom check, header setup, and padding zeroing via __nla_reserve(). The subsequent skb_copy_bits() fills in the payload data on top of the properly initialized attribute.(CVE-2026-31428)

In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: algif_aead - Revert to operating out-of-place\n\nThis mostly reverts commit 72548b093ee3 except for the copying of the associated data.\n\nThere is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.(CVE-2026-31431)

Severity

9.1 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-27558	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-71089	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23096	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23378	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23398	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23406	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23407	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23442	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23447	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23449	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23452	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23455	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23456	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23457	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23458	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-23475	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-31389	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-31415	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-31416	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-31427	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-31428	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-31431	ADVISORY

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{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "bpftool-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "bpftool-debuginfo-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "kernel-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "kernel-debuginfo-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "kernel-debugsource-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "kernel-devel-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "kernel-headers-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "kernel-source-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "kernel-tools-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "kernel-tools-debuginfo-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "kernel-tools-devel-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "perf-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "perf-debuginfo-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "python3-perf-6.6.0-145.0.7.134.oe2403.aarch64.rpm",
          "python3-perf-debuginfo-6.6.0-145.0.7.134.oe2403.aarch64.rpm"
        ],
        "src": [
          "kernel-6.6.0-145.0.7.134.oe2403.src.rpm"
        ],
        "x86_64": [
          "bpftool-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "bpftool-debuginfo-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "kernel-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "kernel-debuginfo-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "kernel-debugsource-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "kernel-devel-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "kernel-headers-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "kernel-source-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "kernel-tools-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "kernel-tools-debuginfo-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "kernel-tools-devel-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "perf-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "perf-debuginfo-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "python3-perf-6.6.0-145.0.7.134.oe2403.x86_64.rpm",
          "python3-perf-debuginfo-6.6.0-145.0.7.134.oe2403.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "kernel",
        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6.0-145.0.7.134.oe2403"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\n\nIEEE P802.11-REVme D1.1 through D7.0 allows FragAttacks against mesh networks. In mesh networks using Wi-Fi Protected Access (WPA, WPA2, or WPA3) or Wired Equivalent Privacy (WEP), an adversary can exploit this vulnerability to inject arbitrary frames towards devices that support receiving non-SSP A-MSDU frames. NOTE: this issue exists because of an incorrect fix for CVE-2020-24588. P802.11-REVme, as of early 2025, is a planned release of the 802.11 standard.(CVE-2025-27558)\n\nIn the Linux kernel, a security vulnerability exists in the IOMMU Shared Virtual Addressing (SVA) feature. On x86 architecture when CONFIG_X86 is set, IOMMU hardware caches kernel page table entries. Due to the lack of notification mechanism for kernel page table changes, when kernel page table pages are freed and reused, the IOMMU may retain stale entries, leading to Use-After-Free (UAF) and Write-After-Free (WAF) conditions. This can be exploited to cause arbitrary physical memory DMA access or privilege escalation.(CVE-2025-71089)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nuacce: fix cdev handling in the cleanup path\n\nWhen cdev_device_add fails, it internally releases the cdev memory,\nand if cdev_device_del is then executed, it will cause a hang error.\nTo fix it, we check the return value of cdev_device_add() and clear\nuacce-\u0026gt;cdev to avoid calling cdev_device_del in the uacce_remove.(CVE-2026-23096)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ife: Fix metalist update behavior\n\nWhenever an ife action replace changes the metalist, instead of\nreplacing the old data on the metalist, the current ife code is appending\nthe new metadata. Aside from being innapropriate behavior, this may lead\nto an unbounded addition of metadata to the metalist which might cause an\nout of bounds error when running the encode op:\n\n[  138.423369][    C1] ==================================================================\n[  138.424317][    C1] BUG: KASAN: slab-out-of-bounds in ife_tlv_meta_encode (net/ife/ife.c:168)\n[  138.424906][    C1] Write of size 4 at addr ffff8880077f4ffe by task ife_out_out_bou/255\n[  138.425778][    C1] CPU: 1 UID: 0 PID: 255 Comm: ife_out_out_bou Not tainted 7.0.0-rc1-00169-gfbdfa8da05b6 #624 PREEMPT(full)\n[  138.425795][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\n[  138.425800][    C1] Call Trace:\n[  138.425804][    C1]  \u0026lt;IRQ\u0026gt;\n[  138.425808][    C1]  dump_stack_lvl (lib/dump_stack.c:122)\n[  138.425828][    C1]  print_report (mm/kasan/report.c:379 mm/kasan/report.c:482)\n[  138.425839][    C1]  ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)\n[  138.425844][    C1]  ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:95 (discriminator 1) ./include/linux/rcupdate.h:975 (discriminator 1) ./include/linux/mmzone.h:2207 (discriminator 1) arch/x86/mm/physaddr.c:54 (discriminator 1))\n[  138.425853][    C1]  ? ife_tlv_meta_encode (net/ife/ife.c:168)\n[  138.425859][    C1]  kasan_report (mm/kasan/report.c:221 mm/kasan/report.c:597)\n[  138.425868][    C1]  ? ife_tlv_meta_encode (net/ife/ife.c:168)\n[  138.425878][    C1]  kasan_check_range (mm/kasan/generic.c:186 (discriminator 1) mm/kasan/generic.c:200 (discriminator 1))\n[  138.425884][    C1]  __asan_memset (mm/kasan/shadow.c:84 (discriminator 2))\n[  138.425889][    C1]  ife_tlv_meta_encode (net/ife/ife.c:168)\n[  138.425893][    C1]  ? ife_tlv_meta_encode (net/ife/ife.c:171)\n[  138.425898][    C1]  ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)\n[  138.425903][    C1]  ife_encode_meta_u16 (net/sched/act_ife.c:57)\n[  138.425910][    C1]  ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)\n[  138.425916][    C1]  ? __asan_memcpy (mm/kasan/shadow.c:105 (discriminator 3))\n[  138.425921][    C1]  ? __pfx_ife_encode_meta_u16 (net/sched/act_ife.c:45)\n[  138.425927][    C1]  ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)\n[  138.425931][    C1]  tcf_ife_act (net/sched/act_ife.c:847 net/sched/act_ife.c:879)\n\nTo solve this issue, fix the replace behavior by adding the metalist to\nthe ife rcu data structure.(CVE-2026-23378)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nicmp: fix NULL pointer dereference in icmp_tag_validation()\n\nicmp_tag_validation() unconditionally dereferences the result of\nrcu_dereference(inet_protos[proto]) without checking for NULL.\nThe inet_protos[] array is sparse -- only about 15 of 256 protocol\nnumbers have registered handlers. When ip_no_pmtu_disc is set to 3\n(hardened PMTU mode) and the kernel receives an ICMP Fragmentation\nNeeded error with a quoted inner IP header containing an unregistered\nprotocol number, the NULL dereference causes a kernel panic in\nsoftirq context.\n\n Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN NOPTI\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n RIP: 0010:icmp_unreach (net/ipv4/icmp.c:1085 net/ipv4/icmp.c:1143)\n Call Trace:\n  \u0026lt;IRQ\u0026gt;\n  icmp_rcv (net/ipv4/icmp.c:1527)\n  ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207)\n  ip_local_deliver_finish (net/ipv4/ip_input.c:242)\n  ip_local_deliver (net/ipv4/ip_input.c:262)\n  ip_rcv (net/ipv4/ip_input.c:573)\n  __netif_receive_skb_one_core (net/core/dev.c:6164)\n  process_backlog (net/core/dev.c:6628)\n  handle_softirqs (kernel/softirq.c:561)\n  \u0026lt;/IRQ\u0026gt;\n\nAdd a NULL check before accessing icmp_strict_tag_validation. If the\nprotocol has no registered handler, return false since it cannot\nperform strict tag validation.(CVE-2026-23398)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix side-effect bug in match_char() macro usage\n\nThe match_char() macro evaluates its character parameter multiple\ntimes when traversing differential encoding chains. When invoked\nwith *str++, the string pointer advances on each iteration of the\ninner do-while loop, causing the DFA to check different characters\nat each iteration and therefore skip input characters.\nThis results in out-of-bounds reads when the pointer advances past\nthe input buffer boundary.\n\n[   94.984676] ==================================================================\n[   94.985301] BUG: KASAN: slab-out-of-bounds in aa_dfa_match+0x5ae/0x760\n[   94.985655] Read of size 1 at addr ffff888100342000 by task file/976\n\n[   94.986319] CPU: 7 UID: 1000 PID: 976 Comm: file Not tainted 6.19.0-rc7-next-20260127 #1 PREEMPT(lazy)\n[   94.986322] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   94.986329] Call Trace:\n[   94.986341]  \u0026lt;TASK\u0026gt;\n[   94.986347]  dump_stack_lvl+0x5e/0x80\n[   94.986374]  print_report+0xc8/0x270\n[   94.986384]  ? aa_dfa_match+0x5ae/0x760\n[   94.986388]  kasan_report+0x118/0x150\n[   94.986401]  ? aa_dfa_match+0x5ae/0x760\n[   94.986405]  aa_dfa_match+0x5ae/0x760\n[   94.986408]  __aa_path_perm+0x131/0x400\n[   94.986418]  aa_path_perm+0x219/0x2f0\n[   94.986424]  apparmor_file_open+0x345/0x570\n[   94.986431]  security_file_open+0x5c/0x140\n[   94.986442]  do_dentry_open+0x2f6/0x1120\n[   94.986450]  vfs_open+0x38/0x2b0\n[   94.986453]  ? may_open+0x1e2/0x2b0\n[   94.986466]  path_openat+0x231b/0x2b30\n[   94.986469]  ? __x64_sys_openat+0xf8/0x130\n[   94.986477]  do_file_open+0x19d/0x360\n[   94.986487]  do_sys_openat2+0x98/0x100\n[   94.986491]  __x64_sys_openat+0xf8/0x130\n[   94.986499]  do_syscall_64+0x8e/0x660\n[   94.986515]  ? count_memcg_events+0x15f/0x3c0\n[   94.986526]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   94.986540]  ? handle_mm_fault+0x1639/0x1ef0\n[   94.986551]  ? vma_start_read+0xf0/0x320\n[   94.986558]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   94.986561]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   94.986563]  ? fpregs_assert_state_consistent+0x50/0xe0\n[   94.986572]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   94.986574]  ? arch_exit_to_user_mode_prepare+0x9/0xb0\n[   94.986587]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   94.986588]  ? irqentry_exit+0x3c/0x590\n[   94.986595]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   94.986597] RIP: 0033:0x7fda4a79c3ea\n\nFix by extracting the character value before invoking match_char,\nensuring single evaluation per outer loop.(CVE-2026-23406)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix missing bounds check on DEFAULT table in verify_dfa()\n\nThe verify_dfa() function only checks DEFAULT_TABLE bounds when the state\nis not differentially encoded.\n\nWhen the verification loop traverses the differential encoding chain,\nit reads k = DEFAULT_TABLE[j] and uses k as an array index without\nvalidation. A malformed DFA with DEFAULT_TABLE[j] \u0026gt;= state_count,\ntherefore, causes both out-of-bounds reads and writes.\n\n[   57.179855] ==================================================================\n[   57.180549] BUG: KASAN: slab-out-of-bounds in verify_dfa+0x59a/0x660\n[   57.180904] Read of size 4 at addr ffff888100eadec4 by task su/993\n\n[   57.181554] CPU: 1 UID: 0 PID: 993 Comm: su Not tainted 6.19.0-rc7-next-20260127 #1 PREEMPT(lazy)\n[   57.181558] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   57.181563] Call Trace:\n[   57.181572]  \u0026lt;TASK\u0026gt;\n[   57.181577]  dump_stack_lvl+0x5e/0x80\n[   57.181596]  print_report+0xc8/0x270\n[   57.181605]  ? verify_dfa+0x59a/0x660\n[   57.181608]  kasan_report+0x118/0x150\n[   57.181620]  ? verify_dfa+0x59a/0x660\n[   57.181623]  verify_dfa+0x59a/0x660\n[   57.181627]  aa_dfa_unpack+0x1610/0x1740\n[   57.181629]  ? __kmalloc_cache_noprof+0x1d0/0x470\n[   57.181640]  unpack_pdb+0x86d/0x46b0\n[   57.181647]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181653]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181656]  ? aa_unpack_nameX+0x1a8/0x300\n[   57.181659]  aa_unpack+0x20b0/0x4c30\n[   57.181662]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181664]  ? stack_depot_save_flags+0x33/0x700\n[   57.181681]  ? kasan_save_track+0x4f/0x80\n[   57.181683]  ? kasan_save_track+0x3e/0x80\n[   57.181686]  ? __kasan_kmalloc+0x93/0xb0\n[   57.181688]  ? __kvmalloc_node_noprof+0x44a/0x780\n[   57.181693]  ? aa_simple_write_to_buffer+0x54/0x130\n[   57.181697]  ? policy_update+0x154/0x330\n[   57.181704]  aa_replace_profiles+0x15a/0x1dd0\n[   57.181707]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181710]  ? __kvmalloc_node_noprof+0x44a/0x780\n[   57.181712]  ? aa_loaddata_alloc+0x77/0x140\n[   57.181715]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181717]  ? _copy_from_user+0x2a/0x70\n[   57.181730]  policy_update+0x17a/0x330\n[   57.181733]  profile_replace+0x153/0x1a0\n[   57.181735]  ? rw_verify_area+0x93/0x2d0\n[   57.181740]  vfs_write+0x235/0xab0\n[   57.181745]  ksys_write+0xb0/0x170\n[   57.181748]  do_syscall_64+0x8e/0x660\n[   57.181762]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   57.181765] RIP: 0033:0x7f6192792eb2\n\nRemove the MATCH_FLAG_DIFF_ENCODE condition to validate all DEFAULT_TABLE\nentries unconditionally.(CVE-2026-23407)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nipv6: add NULL checks for idev in SRv6 paths\n\n__in6_dev_get() can return NULL when the device has no IPv6 configuration\n(e.g. MTU \u0026lt; IPV6_MIN_MTU or after NETDEV_UNREGISTER).\n\nAdd NULL checks for idev returned by __in6_dev_get() in both\nseg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL\npointer dereferences.(CVE-2026-23442)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check\n\nThe same bounds-check bug fixed for NDP16 in the previous patch also\nexists in cdc_ncm_rx_verify_ndp32(). The DPE array size is validated\nagainst the total skb length without accounting for ndpoffset, allowing\nout-of-bounds reads when the NDP32 is placed near the end of the NTB.\n\nAdd ndpoffset to the nframes bounds check and use struct_size_t() to\nexpress the NDP-plus-DPE-array size more clearly.\n\nCompile-tested only.(CVE-2026-23447)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: teql: Fix double-free in teql_master_xmit\n\nWhenever a TEQL devices has a lockless Qdisc as root, qdisc_reset should\nbe called using the seq_lock to avoid racing with the datapath. Failure\nto do so may cause crashes like the following:\n\n[  238.028993][  T318] BUG: KASAN: double-free in skb_release_data (net/core/skbuff.c:1139)\n[  238.029328][  T318] Free of addr ffff88810c67ec00 by task poc_teql_uaf_ke/318\n[  238.029749][  T318]\n[  238.029900][  T318] CPU: 3 UID: 0 PID: 318 Comm: poc_teql_ke Not tainted 7.0.0-rc3-00149-ge5b31d988a41 #704 PREEMPT(full)\n[  238.029906][  T318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011\n[  238.029910][  T318] Call Trace:\n[  238.029913][  T318]  \u0026lt;TASK\u0026gt;\n[  238.029916][  T318]  dump_stack_lvl (lib/dump_stack.c:122)\n[  238.029928][  T318]  print_report (mm/kasan/report.c:379 mm/kasan/report.c:482)\n[  238.029940][  T318]  ? skb_release_data (net/core/skbuff.c:1139)\n[  238.029944][  T318]  ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)\n...\n[  238.029957][  T318]  ? skb_release_data (net/core/skbuff.c:1139)\n[  238.029969][  T318]  kasan_report_invalid_free (mm/kasan/report.c:221 mm/kasan/report.c:563)\n[  238.029979][  T318]  ? skb_release_data (net/core/skbuff.c:1139)\n[  238.029989][  T318]  check_slab_allocation (mm/kasan/common.c:231)\n[  238.029995][  T318]  kmem_cache_free (mm/slub.c:2637 (discriminator 1) mm/slub.c:6168 (discriminator 1) mm/slub.c:6298 (discriminator 1))\n[  238.030004][  T318]  skb_release_data (net/core/skbuff.c:1139)\n...\n[  238.030025][  T318]  sk_skb_reason_drop (net/core/skbuff.c:1256)\n[  238.030032][  T318]  pfifo_fast_reset (./include/linux/ptr_ring.h:171 ./include/linux/ptr_ring.h:309 ./include/linux/skb_array.h:98 net/sched/sch_generic.c:827)\n[  238.030039][  T318]  ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)\n...\n[  238.030054][  T318]  qdisc_reset (net/sched/sch_generic.c:1034)\n[  238.030062][  T318]  teql_destroy (./include/linux/spinlock.h:395 net/sched/sch_teql.c:157)\n[  238.030071][  T318]  __qdisc_destroy (./include/net/pkt_sched.h:328 net/sched/sch_generic.c:1077)\n[  238.030077][  T318]  qdisc_graft (net/sched/sch_api.c:1062 net/sched/sch_api.c:1053 net/sched/sch_api.c:1159)\n[  238.030089][  T318]  ? __pfx_qdisc_graft (net/sched/sch_api.c:1091)\n[  238.030095][  T318]  ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)\n[  238.030102][  T318]  ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)\n[  238.030106][  T318]  ? srso_alias_return_thunk (arch/x86/lib/retpoline.S:221)\n[  238.030114][  T318]  tc_get_qdisc (net/sched/sch_api.c:1529 net/sched/sch_api.c:1556)\n...\n[  238.072958][  T318] Allocated by task 303 on cpu 5 at 238.026275s:\n[  238.073392][  T318]  kasan_save_stack (mm/kasan/common.c:58)\n[  238.073884][  T318]  kasan_save_track (mm/kasan/common.c:64 (discriminator 5) mm/kasan/common.c:79 (discriminator 5))\n[  238.074230][  T318]  __kasan_slab_alloc (mm/kasan/common.c:369)\n[  238.074578][  T318]  kmem_cache_alloc_node_noprof (./include/linux/kasan.h:253 mm/slub.c:4542 mm/slub.c:4869 mm/slub.c:4921)\n[  238.076091][  T318]  kmalloc_reserve (net/core/skbuff.c:616 (discriminator 107))\n[  238.076450][  T318]  __alloc_skb (net/core/skbuff.c:713)\n[  238.076834][  T318]  alloc_skb_with_frags (./include/linux/skbuff.h:1383 net/core/skbuff.c:6763)\n[  238.077178][  T318]  sock_alloc_send_pskb (net/core/sock.c:2997)\n[  238.077520][  T318]  packet_sendmsg (net/packet/af_packet.c:2926 net/packet/af_packet.c:3019 net/packet/af_packet.c:3108)\n[  238.081469][  T318]\n[  238.081870][  T318] Freed by task 299 on cpu 1 at 238.028496s:\n[  238.082761][  T318]  kasan_save_stack (mm/kasan/common.c:58)\n[  238.083481][  T318]  kasan_save_track (mm/kasan/common.c:64 (discriminator 5) mm/kasan/common.c:79 (discriminator 5))\n[  238.085348][  T318]  kasan_save_free_info (mm/kasan/generic.c:587 (discriminator 1))\n[  238.085900][  T318]  __kasan_slab_free (mm/\n---truncated---(CVE-2026-23449)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nPM: runtime: Fix a race condition related to device removal\n\nThe following code in pm_runtime_work() may dereference the dev-\u0026gt;parent\npointer after the parent device has been freed:\n\n\t/* Maybe the parent is now able to suspend. */\n\tif (parent \u0026amp;\u0026amp; !parent-\u0026gt;power.ignore_children) {\n\t\tspin_unlock(\u0026amp;dev-\u0026gt;power.lock);\n\n\t\tspin_lock(\u0026amp;parent-\u0026gt;power.lock);\n\t\trpm_idle(parent, RPM_ASYNC);\n\t\tspin_unlock(\u0026amp;parent-\u0026gt;power.lock);\n\n\t\tspin_lock(\u0026amp;dev-\u0026gt;power.lock);\n\t}\n\nFix this by inserting a flush_work() call in pm_runtime_remove().\n\nWithout this patch blktest block/001 triggers the following complaint\nsporadically:\n\nBUG: KASAN: slab-use-after-free in lock_acquire+0x70/0x160\nRead of size 1 at addr ffff88812bef7198 by task kworker/u553:1/3081\nWorkqueue: pm pm_runtime_work\nCall Trace:\n \u0026lt;TASK\u0026gt;\n dump_stack_lvl+0x61/0x80\n print_address_description.constprop.0+0x8b/0x310\n print_report+0xfd/0x1d7\n kasan_report+0xd8/0x1d0\n __kasan_check_byte+0x42/0x60\n lock_acquire.part.0+0x38/0x230\n lock_acquire+0x70/0x160\n _raw_spin_lock+0x36/0x50\n rpm_suspend+0xc6a/0xfe0\n rpm_idle+0x578/0x770\n pm_runtime_work+0xee/0x120\n process_one_work+0xde3/0x1410\n worker_thread+0x5eb/0xfe0\n kthread+0x37b/0x480\n ret_from_fork+0x6cb/0x920\n ret_from_fork_asm+0x11/0x20\n \u0026lt;/TASK\u0026gt;\n\nAllocated by task 4314:\n kasan_save_stack+0x2a/0x50\n kasan_save_track+0x18/0x40\n kasan_save_alloc_info+0x3d/0x50\n __kasan_kmalloc+0xa0/0xb0\n __kmalloc_noprof+0x311/0x990\n scsi_alloc_target+0x122/0xb60 [scsi_mod]\n __scsi_scan_target+0x101/0x460 [scsi_mod]\n scsi_scan_channel+0x179/0x1c0 [scsi_mod]\n scsi_scan_host_selected+0x259/0x2d0 [scsi_mod]\n store_scan+0x2d2/0x390 [scsi_mod]\n dev_attr_store+0x43/0x80\n sysfs_kf_write+0xde/0x140\n kernfs_fop_write_iter+0x3ef/0x670\n vfs_write+0x506/0x1470\n ksys_write+0xfd/0x230\n __x64_sys_write+0x76/0xc0\n x64_sys_call+0x213/0x1810\n do_syscall_64+0xee/0xfc0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nFreed by task 4314:\n kasan_save_stack+0x2a/0x50\n kasan_save_track+0x18/0x40\n kasan_save_free_info+0x3f/0x50\n __kasan_slab_free+0x67/0x80\n kfree+0x225/0x6c0\n scsi_target_dev_release+0x3d/0x60 [scsi_mod]\n device_release+0xa3/0x220\n kobject_cleanup+0x105/0x3a0\n kobject_put+0x72/0xd0\n put_device+0x17/0x20\n scsi_device_dev_release+0xacf/0x12c0 [scsi_mod]\n device_release+0xa3/0x220\n kobject_cleanup+0x105/0x3a0\n kobject_put+0x72/0xd0\n put_device+0x17/0x20\n scsi_device_put+0x7f/0xc0 [scsi_mod]\n sdev_store_delete+0xa5/0x120 [scsi_mod]\n dev_attr_store+0x43/0x80\n sysfs_kf_write+0xde/0x140\n kernfs_fop_write_iter+0x3ef/0x670\n vfs_write+0x506/0x1470\n ksys_write+0xfd/0x230\n __x64_sys_write+0x76/0xc0\n x64_sys_call+0x213/0x1810(CVE-2026-23452)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_h323: check for zero length in DecodeQ931()\n\nIn DecodeQ931(), the UserUserIE code path reads a 16-bit length from\nthe packet, then decrements it by 1 to skip the protocol discriminator\nbyte before passing it to DecodeH323_UserInformation(). If the encoded\nlength is 0, the decrement wraps to -1, which is then passed as a\nlarge value to the decoder, leading to an out-of-bounds read.\n\nAdd a check to ensure len is positive after the decrement.(CVE-2026-23455)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case\n\nIn decode_int(), the CONS case calls get_bits(bs, 2) to read a length\nvalue, then calls get_uint(bs, len) without checking that len bytes\nremain in the buffer. The existing boundary check only validates the\n2 bits for get_bits(), not the subsequent 1-4 bytes that get_uint()\nreads. This allows a malformed H.323/RAS packet to cause a 1-4 byte\nslab-out-of-bounds read.\n\nAdd a boundary check for len bytes after get_bits() and before\nget_uint().(CVE-2026-23456)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp()\n\nsip_help_tcp() parses the SIP Content-Length header with\nsimple_strtoul(), which returns unsigned long, but stores the result in\nunsigned int clen.  On 64-bit systems, values exceeding UINT_MAX are\nsilently truncated before computing the SIP message boundary.\n\nFor example, Content-Length 4294967328 (2^32 + 32) is truncated to 32,\ncausing the parser to miscalculate where the current message ends.  The\nloop then treats trailing data in the TCP segment as a second SIP\nmessage and processes it through the SDP parser.\n\nFix this by changing clen to unsigned long to match the return type of\nsimple_strtoul(), and reject Content-Length values that exceed the\nremaining TCP payload length.(CVE-2026-23457)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ctnetlink: fix use-after-free in ctnetlink_dump_exp_ct()\n\nctnetlink_dump_exp_ct() stores a conntrack pointer in cb-\u0026gt;data for the\nnetlink dump callback ctnetlink_exp_ct_dump_table(), but drops the\nconntrack reference immediately after netlink_dump_start().  When the\ndump spans multiple rounds, the second recvmsg() triggers the dump\ncallback which dereferences the now-freed conntrack via nfct_help(ct),\nleading to a use-after-free on ct-\u0026gt;ext.\n\nThe bug is that the netlink_dump_control has no .start or .done\ncallbacks to manage the conntrack reference across dump rounds.  Other\ndump functions in the same file (e.g. ctnetlink_get_conntrack) properly\nuse .start/.done callbacks for this purpose.\n\nFix this by adding .start and .done callbacks that hold and release the\nconntrack reference for the duration of the dump, and move the\nnfct_help() call after the cb-\u0026gt;args[0] early-return check in the dump\ncallback to avoid dereferencing ct-\u0026gt;ext unnecessarily.\n\n BUG: KASAN: slab-use-after-free in ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n Read of size 8 at addr ffff88810597ebf0 by task ctnetlink_poc/133\n\n CPU: 1 UID: 0 PID: 133 Comm: ctnetlink_poc Not tainted 7.0.0-rc2+ #3 PREEMPTLAZY\n Call Trace:\n  \u0026lt;TASK\u0026gt;\n  ctnetlink_exp_ct_dump_table+0x4f/0x2e0\n  netlink_dump+0x333/0x880\n  netlink_recvmsg+0x3e2/0x4b0\n  ? aa_sk_perm+0x184/0x450\n  sock_recvmsg+0xde/0xf0\n\n Allocated by task 133:\n  kmem_cache_alloc_noprof+0x134/0x440\n  __nf_conntrack_alloc+0xa8/0x2b0\n  ctnetlink_create_conntrack+0xa1/0x900\n  ctnetlink_new_conntrack+0x3cf/0x7d0\n  nfnetlink_rcv_msg+0x48e/0x510\n  netlink_rcv_skb+0xc9/0x1f0\n  nfnetlink_rcv+0xdb/0x220\n  netlink_unicast+0x3ec/0x590\n  netlink_sendmsg+0x397/0x690\n  __sys_sendmsg+0xf4/0x180\n\n Freed by task 0:\n  slab_free_after_rcu_debug+0xad/0x1e0\n  rcu_core+0x5c3/0x9c0(CVE-2026-23458)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nspi: fix statistics allocation\n\nThe controller per-cpu statistics is not allocated until after the\ncontroller has been registered with driver core, which leaves a window\nwhere accessing the sysfs attributes can trigger a NULL-pointer\ndereference.\n\nFix this by moving the statistics allocation to controller allocation\nwhile tying its lifetime to that of the controller (rather than using\nimplicit devres).(CVE-2026-23475)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nspi: fix use-after-free on controller registration failure\n\nMake sure to deregister from driver core also in the unlikely event that\nper-cpu statistics allocation fails during controller registration to\navoid use-after-free (of driver resources) and unclocked register\naccesses.(CVE-2026-31389)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nipv6: avoid overflows in ip6_datagram_send_ctl()\n\nYiming Qian reported :\n\u0026lt;quote\u0026gt;\n I believe I found a locally triggerable kernel bug in the IPv6 sendmsg\n ancillary-data path that can panic the kernel via `skb_under_panic()`\n (local DoS).\n\n The core issue is a mismatch between:\n\n - a 16-bit length accumulator (`struct ipv6_txoptions::opt_flen`, type\n `__u16`) and\n - a pointer to the *last* provided destination-options header (`opt-\u0026gt;dst1opt`)\n\n when multiple `IPV6_DSTOPTS` control messages (cmsgs) are provided.\n\n - `include/net/ipv6.h`:\n   - `struct ipv6_txoptions::opt_flen` is `__u16` (wrap possible).\n (lines 291-307, especially 298)\n - `net/ipv6/datagram.c:ip6_datagram_send_ctl()`:\n   - Accepts repeated `IPV6_DSTOPTS` and accumulates into `opt_flen`\n without rejecting duplicates. (lines 909-933)\n - `net/ipv6/ip6_output.c:__ip6_append_data()`:\n   - Uses `opt-\u0026gt;opt_flen + opt-\u0026gt;opt_nflen` to compute header\n sizes/headroom decisions. (lines 1448-1466, especially 1463-1465)\n - `net/ipv6/ip6_output.c:__ip6_make_skb()`:\n   - Calls `ipv6_push_frag_opts()` if `opt-\u0026gt;opt_flen` is non-zero.\n (lines 1930-1934)\n - `net/ipv6/exthdrs.c:ipv6_push_frag_opts()` / `ipv6_push_exthdr()`:\n   - Push size comes from `ipv6_optlen(opt-\u0026gt;dst1opt)` (based on the\n pointed-to header). (lines 1179-1185 and 1206-1211)\n\n 1. `opt_flen` is a 16-bit accumulator:\n\n - `include/net/ipv6.h:298` defines `__u16 opt_flen; /* after fragment hdr */`.\n\n 2. `ip6_datagram_send_ctl()` accepts *repeated* `IPV6_DSTOPTS` cmsgs\n and increments `opt_flen` each time:\n\n - In `net/ipv6/datagram.c:909-933`, for `IPV6_DSTOPTS`:\n   - It computes `len = ((hdr-\u0026gt;hdrlen + 1) \u0026lt;\u0026lt; 3);`\n   - It checks `CAP_NET_RAW` using `ns_capable(net-\u0026gt;user_ns,\n CAP_NET_RAW)`. (line 922)\n   - Then it does:\n     - `opt-\u0026gt;opt_flen += len;` (line 927)\n     - `opt-\u0026gt;dst1opt = hdr;` (line 928)\n\n There is no duplicate rejection here (unlike the legacy\n `IPV6_2292DSTOPTS` path which rejects duplicates at\n `net/ipv6/datagram.c:901-904`).\n\n If enough large `IPV6_DSTOPTS` cmsgs are provided, `opt_flen` wraps\n while `dst1opt` still points to a large (2048-byte)\n destination-options header.\n\n In the attached PoC (`poc.c`):\n\n - 32 cmsgs with `hdrlen=255` =\u0026gt; `len = (255+1)*8 = 2048`\n - 1 cmsg with `hdrlen=0` =\u0026gt; `len = 8`\n - Total increment: `32*2048 + 8 = 65544`, so `(__u16)opt_flen == 8`\n - The last cmsg is 2048 bytes, so `dst1opt` points to a 2048-byte header.\n\n 3. The transmit path sizes headers using the wrapped `opt_flen`:\n\n- In `net/ipv6/ip6_output.c:1463-1465`:\n  - `headersize = sizeof(struct ipv6hdr) + (opt ? opt-\u0026gt;opt_flen +\n opt-\u0026gt;opt_nflen : 0) + ...;`\n\n With wrapped `opt_flen`, `headersize`/headroom decisions underestimate\n what will be pushed later.\n\n 4. When building the final skb, the actual push length comes from\n `dst1opt` and is not limited by wrapped `opt_flen`:\n\n - In `net/ipv6/ip6_output.c:1930-1934`:\n   - `if (opt-\u0026gt;opt_flen) proto = ipv6_push_frag_opts(skb, opt, proto);`\n - In `net/ipv6/exthdrs.c:1206-1211`, `ipv6_push_frag_opts()` pushes\n `dst1opt` via `ipv6_push_exthdr()`.\n - In `net/ipv6/exthdrs.c:1179-1184`, `ipv6_push_exthdr()` does:\n   - `skb_push(skb, ipv6_optlen(opt));`\n   - `memcpy(h, opt, ipv6_optlen(opt));`\n\n With insufficient headroom, `skb_push()` underflows and triggers\n `skb_under_panic()` -\u0026gt; `BUG()`:\n\n - `net/core/skbuff.c:2669-2675` (`skb_push()` calls `skb_under_panic()`)\n - `net/core/skbuff.c:207-214` (`skb_panic()` ends in `BUG()`)\n\n - The `IPV6_DSTOPTS` cmsg path requires `CAP_NET_RAW` in the target\n netns user namespace (`ns_capable(net-\u0026gt;user_ns, CAP_NET_RAW)`).\n - Root (or any task with `CAP_NET_RAW`) can trigger this without user\n namespaces.\n - An unprivileged `uid=1000` user can trigger this if unprivileged\n user namespaces are enabled and it can create a userns+netns to obtain\n namespaced `CAP_NET_RAW` (the attached PoC does this).\n\n - Local denial of service: kernel BUG/panic (system crash).\n -\n---truncated---(CVE-2026-31415)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: account for netlink header size\n\nThis is a followup to an old bug fix: NLMSG_DONE needs to account\nfor the netlink header size, not just the attribute size.\n\nThis can result in a WARN splat + drop of the netlink message,\nbut other than this there are no ill effects.(CVE-2026-31416)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_sip: fix use of uninitialized rtp_addr in process_sdp\n\nprocess_sdp() declares union nf_inet_addr rtp_addr on the stack and\npasses it to the nf_nat_sip sdp_session hook after walking the SDP\nmedia descriptions. However rtp_addr is only initialized inside the\nmedia loop when a recognized media type with a non-zero port is found.\n\nIf the SDP body contains no m= lines, only inactive media sections\n(m=audio 0 ...) or only unrecognized media types, rtp_addr is never\nassigned. Despite that, the function still calls hooks-\u0026gt;sdp_session()\nwith \u0026amp;rtp_addr, causing nf_nat_sdp_session() to format the stale stack\nvalue as an IP address and rewrite the SDP session owner and connection\nlines with it.\n\nWith CONFIG_INIT_STACK_ALL_ZERO (default on most distributions) this\nresults in the session-level o= and c= addresses being rewritten to\n0.0.0.0 for inactive SDP sessions. Without stack auto-init the\nrewritten address is whatever happened to be on the stack.\n\nFix this by pre-initializing rtp_addr from the session-level connection\naddress (caddr) when available, and tracking via a have_rtp_addr flag\nwhether any valid address was established. Skip the sdp_session hook\nentirely when no valid address exists.(CVE-2026-31427)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD\n\n__build_packet_message() manually constructs the NFULA_PAYLOAD netlink\nattribute using skb_put() and skb_copy_bits(), bypassing the standard\nnla_reserve()/nla_put() helpers. While nla_total_size(data_len) bytes\nare allocated (including NLA alignment padding), only data_len bytes\nof actual packet data are copied. The trailing nla_padlen(data_len)\nbytes (1-3 when data_len is not 4-byte aligned) are never initialized,\nleaking stale heap contents to userspace via the NFLOG netlink socket.\n\nReplace the manual attribute construction with nla_reserve(), which\nhandles the tailroom check, header setup, and padding zeroing via\n__nla_reserve(). The subsequent skb_copy_bits() fills in the payload\ndata on top of the properly initialized attribute.(CVE-2026-31428)\n\nIn the Linux kernel, the following vulnerability has been resolved:\\n\\ncrypto: algif_aead - Revert to operating out-of-place\\n\\nThis mostly reverts commit 72548b093ee3 except for the copying of the associated data.\\n\\nThere is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.(CVE-2026-31431)",
  "id": "OESA-2026-2176",
  "modified": "2026-08-06T11:11:09Z",
  "published": "2026-05-03T11:11:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2176"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27558"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71089"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23096"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23378"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23398"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23406"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23407"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23442"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23447"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23449"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23452"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23455"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23456"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23457"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23458"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23475"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31389"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31415"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31416"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31427"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31428"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31431"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2025-27558",
    "CVE-2025-71089",
    "CVE-2026-23096",
    "CVE-2026-23378",
    "CVE-2026-23398",
    "CVE-2026-23406",
    "CVE-2026-23407",
    "CVE-2026-23442",
    "CVE-2026-23447",
    "CVE-2026-23449",
    "CVE-2026-23452",
    "CVE-2026-23455",
    "CVE-2026-23456",
    "CVE-2026-23457",
    "CVE-2026-23458",
    "CVE-2026-23475",
    "CVE-2026-31389",
    "CVE-2026-31415",
    "CVE-2026-31416",
    "CVE-2026-31427",
    "CVE-2026-31428",
    "CVE-2026-31431"
  ]
}

OPENSUSE-SU-2026:20826-1

Vulnerability from csaf_opensuse - Published: 2026-05-28 12:58 - Updated: 2026-10-12 17:33

Summary

Security update for the Linux Kernel

Severity

Important

Scope

206 vulnerabilities in this advisory, including CVE-2026-23458.

CVE-2026-23458

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 136 products

Open the full advisory

SSA-019113

Vulnerability from csaf_siemens - Published: 2026-07-14 00:00 - Updated: 2026-10-13 00:00

Summary

SSA-019113: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.6

Scope

431 vulnerabilities in this advisory, including CVE-2026-23458.

CVE-2026-23458

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Known affected: 5 products

Open the full advisory

SSA-082556

Vulnerability from csaf_siemens - Published: 2025-06-10 00:00 - Updated: 2026-10-13 00:00

Summary

SSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5

Scope

316 vulnerabilities in this advisory, including CVE-2026-23458.

CVE-2026-23458

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Known affected: 5 products

Open the full advisory

SSA-457936

Vulnerability from csaf_siemens - Published: 2026-10-13 00:00 - Updated: 2026-10-13 00:00

Summary

SSA-457936: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.7

Scope

428 vulnerabilities in this advisory, including CVE-2026-23458.

CVE-2026-23458

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Known affected: 5 products

Open the full advisory

SUSE-SU-2026:2068-1

Vulnerability from csaf_suse - Published: 2026-05-26 07:29 - Updated: 2026-09-16 19:34

Summary

Security update for the Linux Kernel

Severity

Important

Scope

74 vulnerabilities in this advisory, including CVE-2026-23458.

CVE-2026-23458

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 164 products

Open the full advisory

SUSE-SU-2026:2111-1

Vulnerability from csaf_suse - Published: 2026-05-29 15:22 - Updated: 2026-10-28 17:54

Summary

Security update for the Linux Kernel

Severity

Important

Scope

62 vulnerabilities in this advisory, including CVE-2026-23458.

CVE-2026-23458

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 4 products

Open the full advisory

SUSE-SU-2026:21834-1

Vulnerability from csaf_suse - Published: 2026-05-28 11:12 - Updated: 2026-09-16 19:51

Summary

Security update for the Linux Kernel

Severity

Important

Scope

206 vulnerabilities in this advisory, including CVE-2026-23458.

CVE-2026-23458

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 8 products

Open the full advisory

SUSE-SU-2026:21841-1

Vulnerability from csaf_suse - Published: 2026-05-28 11:40 - Updated: 2026-10-15 17:07

Summary

Security update for the Linux Kernel

Severity

Important

Scope

206 vulnerabilities in this advisory, including CVE-2026-23458.

CVE-2026-23458

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 28 products

Open the full advisory

SUSE-SU-2026:21845-1

Vulnerability from csaf_suse - Published: 2026-05-28 11:49 - Updated: 2026-09-16 19:52

Summary

Security update for the Linux Kernel

Severity

Important

Scope

206 vulnerabilities in this advisory, including CVE-2026-23458.

CVE-2026-23458

7 (High)


                
                  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Recommended: 9 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-23458 (GCVE-0-2026-23458)

OESA-2026-2176 (CVE-2025-27558)

Tags

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Vulnerability timeline

Related by attack behaviour