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alsa-2026:59723
Vulnerability from osv_almalinux
Published
2026-08-26 00:00
Modified
2026-08-28 08:49
Summary
Important: kernel security, bug fix, and enhancement update
Details
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
- kernel: ksm: use range-walk function to jump over holes in scan_get_next_rmap_item (CVE-2025-68211)
- kernel: ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv() (CVE-2026-23003)
- kernel: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry (CVE-2026-43114)
- kernel: sctp: purge outqueue on stale COOKIE-ECHO handling (CVE-2026-52924)
- kernel: netfilter: xt_policy: fix strict mode inbound policy matching (CVE-2026-52920)
- kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)
- kernel: netfilter: require Ethernet MAC header before using eth_hdr() (CVE-2026-53131)
- kernel: netfilter: conntrack_irc: fix possible out-of-bounds read (CVE-2026-53268)
- kernel: i2c: stub: Reject I2C block transfers with invalid length (CVE-2026-64191)
- kernel: netfilter: ipset: fix race between dump and ip_set_list resize (CVE-2026-64189)
- kernel: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count (CVE-2026-64277)
- kernel: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count (CVE-2026-64276)
- kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res->rt6 pointer (CVE-2026-74581)
Bug Fix(es) and Enhancement(s):
- [AlmaLinux-9.8.z] Intel CWF: CPU is unable to obtain cstate1 on idle system (JIRA:AlmaLinux-166118)
- ss core dumped when there is an SCTP session [almalinux-9.8.z] (JIRA:AlmaLinux-212398)
- [IBM 9.9 FEAT] zcrypt driver overwrite function - kernel part [almalinux-9.8.z] (JIRA:AlmaLinux-245333)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
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"details": "The kernel packages contain the Linux kernel, the core of any Linux operating system. \n\nSecurity Fix(es): \n\n * kernel: ksm: use range-walk function to jump over holes in scan_get_next_rmap_item (CVE-2025-68211)\n * kernel: ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv() (CVE-2026-23003)\n * kernel: netfilter: nft_set_pipapo_avx2: don\u0027t return non-matching entry on expiry (CVE-2026-43114)\n * kernel: sctp: purge outqueue on stale COOKIE-ECHO handling (CVE-2026-52924)\n * kernel: netfilter: xt_policy: fix strict mode inbound policy matching (CVE-2026-52920)\n * kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)\n * kernel: netfilter: require Ethernet MAC header before using eth_hdr() (CVE-2026-53131)\n * kernel: netfilter: conntrack_irc: fix possible out-of-bounds read (CVE-2026-53268)\n * kernel: i2c: stub: Reject I2C block transfers with invalid length (CVE-2026-64191)\n * kernel: netfilter: ipset: fix race between dump and ip_set_list resize (CVE-2026-64189)\n * kernel: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count (CVE-2026-64277)\n * kernel: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count (CVE-2026-64276)\n * kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res-\u003ert6 pointer (CVE-2026-74581)\n\n\nBug Fix(es) and Enhancement(s): \n\n * [AlmaLinux-9.8.z] Intel CWF: CPU is unable to obtain cstate1 on idle system (JIRA:AlmaLinux-166118)\n * ss core dumped when there is an SCTP session [almalinux-9.8.z] (JIRA:AlmaLinux-212398)\n * [IBM 9.9 FEAT] zcrypt driver overwrite function - kernel part [almalinux-9.8.z] (JIRA:AlmaLinux-245333)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
"id": "ALSA-2026:59723",
"modified": "2026-08-28T08:49:54Z",
"published": "2026-08-26T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:59723"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-68211"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-23003"
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"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-74581"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2422696"
},
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"type": "REPORT",
"url": "https://bugzilla.redhat.com/2432681"
},
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"url": "https://bugzilla.redhat.com/2466994"
},
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"url": "https://bugzilla.redhat.com/2492095"
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"url": "https://bugzilla.redhat.com/2492112"
},
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"type": "REPORT",
"url": "https://bugzilla.redhat.com/2492735"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2492747"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2492770"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2502872"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2502889"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2507290"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2507301"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2520980"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/9/ALSA-2026-59723.html"
}
],
"related": [
"CVE-2025-68211",
"CVE-2026-23003",
"CVE-2026-43114",
"CVE-2026-52924",
"CVE-2026-52920",
"CVE-2026-53185",
"CVE-2026-53131",
"CVE-2026-53268",
"CVE-2026-64191",
"CVE-2026-64189",
"CVE-2026-64277",
"CVE-2026-64276",
"CVE-2026-74581"
],
"summary": "Important: kernel security, bug fix, and enhancement update"
}
CVE-2025-68211 (GCVE-0-2025-68211)
Vulnerability from cvelistv5 – Published: 2025-12-16 13:48 – Updated: 2026-06-11 18:44
VLAI
EPSS
VEX
Title
ksm: use range-walk function to jump over holes in scan_get_next_rmap_item
Summary
In the Linux kernel, the following vulnerability has been resolved:
ksm: use range-walk function to jump over holes in scan_get_next_rmap_item
Currently, scan_get_next_rmap_item() walks every page address in a VMA to
locate mergeable pages. This becomes highly inefficient when scanning
large virtual memory areas that contain mostly unmapped regions, causing
ksmd to use large amount of cpu without deduplicating much pages.
This patch replaces the per-address lookup with a range walk using
walk_page_range(). The range walker allows KSM to skip over entire
unmapped holes in a VMA, avoiding unnecessary lookups. This problem was
previously discussed in [1].
Consider the following test program which creates a 32 TiB mapping in the
virtual address space but only populates a single page:
#include <unistd.h>
#include <stdio.h>
#include <sys/mman.h>
/* 32 TiB */
const size_t size = 32ul * 1024 * 1024 * 1024 * 1024;
int main() {
char *area = mmap(NULL, size, PROT_READ | PROT_WRITE,
MAP_NORESERVE | MAP_PRIVATE | MAP_ANON, -1, 0);
if (area == MAP_FAILED) {
perror("mmap() failed\n");
return -1;
}
/* Populate a single page such that we get an anon_vma. */
*area = 0;
/* Enable KSM. */
madvise(area, size, MADV_MERGEABLE);
pause();
return 0;
}
$ ./ksm-sparse &
$ echo 1 > /sys/kernel/mm/ksm/run
Without this patch ksmd uses 100% of the cpu for a long time (more then 1
hour in my test machine) scanning all the 32 TiB virtual address space
that contain only one mapped page. This makes ksmd essentially deadlocked
not able to deduplicate anything of value. With this patch ksmd walks
only the one mapped page and skips the rest of the 32 TiB virtual address
space, making the scan fast using little cpu.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 20:42 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/220cb3e425e17587f… | |
| https://git.kernel.org/stable/c/10644e8839544dd56… | |
| https://git.kernel.org/stable/c/67137b715b7db28d8… | |
| https://git.kernel.org/stable/c/9c2f8a9b68024e5eb… | |
| https://git.kernel.org/stable/c/74f78421c925b6d17… | |
| https://git.kernel.org/stable/c/f62973e0767e4fcd6… | |
| https://git.kernel.org/stable/c/f5548c318d6520d4f… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
31dbd01f314364b70c2e026a5793a29a4da8a9dc , < 220cb3e425e17587f560335924cba9f16a842c64
(git)
Affected: 31dbd01f314364b70c2e026a5793a29a4da8a9dc , < 10644e8839544dd5699c03c8fb1aeeefc41602fd (git) Affected: 31dbd01f314364b70c2e026a5793a29a4da8a9dc , < 67137b715b7db28d82e4ed07a7092c2fa6ba7adb (git) Affected: 31dbd01f314364b70c2e026a5793a29a4da8a9dc , < 9c2f8a9b68024e5ebb4813665845ec0a95f2eac3 (git) Affected: 31dbd01f314364b70c2e026a5793a29a4da8a9dc , < 74f78421c925b6d17695566f0c5941de57fd44b3 (git) Affected: 31dbd01f314364b70c2e026a5793a29a4da8a9dc , < f62973e0767e4fcd6799087787fca08ca2a85b8c (git) Affected: 31dbd01f314364b70c2e026a5793a29a4da8a9dc , < f5548c318d6520d4fa3c5ed6003eeb710763cbc5 (git) |
|
| Linux | Linux |
Affected:
2.6.32
Unaffected: 0 , < 2.6.32 (semver) Unaffected: 5.10.249 , ≤ 5.10.* (semver) Unaffected: 5.15.199 , ≤ 5.15.* (semver) Unaffected: 6.1.161 , ≤ 6.1.* (semver) Unaffected: 6.6.121 , ≤ 6.6.* (semver) Unaffected: 6.12.59 , ≤ 6.12.* (semver) Unaffected: 6.17.9 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix) |
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"dateReserved": "2025-12-16T13:41:40.256Z",
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CVE-2026-23003 (GCVE-0-2026-23003)
Vulnerability from cvelistv5 – Published: 2026-01-25 14:36 – Updated: 2026-08-05 12:20
VLAI
EPSS
VEX
Title
ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()
Summary
In the Linux kernel, the following vulnerability has been resolved:
ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv()
Blamed commit did not take care of VLAN encapsulations
as spotted by syzbot [1].
Use skb_vlan_inet_prepare() instead of pskb_inet_may_pull().
[1]
BUG: KMSAN: uninit-value in __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline]
BUG: KMSAN: uninit-value in INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline]
BUG: KMSAN: uninit-value in IP6_ECN_decapsulate+0x7a8/0x1fa0 include/net/inet_ecn.h:321
__INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline]
INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline]
IP6_ECN_decapsulate+0x7a8/0x1fa0 include/net/inet_ecn.h:321
ip6ip6_dscp_ecn_decapsulate+0x16f/0x1b0 net/ipv6/ip6_tunnel.c:729
__ip6_tnl_rcv+0xed9/0x1b50 net/ipv6/ip6_tunnel.c:860
ip6_tnl_rcv+0xc3/0x100 net/ipv6/ip6_tunnel.c:903
gre_rcv+0x1529/0x1b90 net/ipv6/ip6_gre.c:-1
ip6_protocol_deliver_rcu+0x1c89/0x2c60 net/ipv6/ip6_input.c:438
ip6_input_finish+0x1f4/0x4a0 net/ipv6/ip6_input.c:489
NF_HOOK include/linux/netfilter.h:318 [inline]
ip6_input+0x9c/0x330 net/ipv6/ip6_input.c:500
ip6_mc_input+0x7ca/0xc10 net/ipv6/ip6_input.c:590
dst_input include/net/dst.h:474 [inline]
ip6_rcv_finish+0x958/0x990 net/ipv6/ip6_input.c:79
NF_HOOK include/linux/netfilter.h:318 [inline]
ipv6_rcv+0xf1/0x3c0 net/ipv6/ip6_input.c:311
__netif_receive_skb_one_core net/core/dev.c:6139 [inline]
__netif_receive_skb+0x1df/0xac0 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x57/0x630 net/core/dev.c:6397
tun_rx_batched+0x1df/0x980 drivers/net/tun.c:1485
tun_get_user+0x5c0e/0x6c60 drivers/net/tun.c:1953
tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0xbe2/0x15d0 fs/read_write.c:686
ksys_write fs/read_write.c:738 [inline]
__do_sys_write fs/read_write.c:749 [inline]
__se_sys_write fs/read_write.c:746 [inline]
__x64_sys_write+0x1fb/0x4d0 fs/read_write.c:746
x64_sys_call+0x30ab/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xd3/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was created at:
slab_post_alloc_hook mm/slub.c:4960 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_node_noprof+0x9e7/0x17a0 mm/slub.c:5315
kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:586
__alloc_skb+0x805/0x1040 net/core/skbuff.c:690
alloc_skb include/linux/skbuff.h:1383 [inline]
alloc_skb_with_frags+0xc5/0xa60 net/core/skbuff.c:6712
sock_alloc_send_pskb+0xacc/0xc60 net/core/sock.c:2995
tun_alloc_skb drivers/net/tun.c:1461 [inline]
tun_get_user+0x1142/0x6c60 drivers/net/tun.c:1794
tun_chr_write_iter+0x3e9/0x5c0 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0xbe2/0x15d0 fs/read_write.c:686
ksys_write fs/read_write.c:738 [inline]
__do_sys_write fs/read_write.c:749 [inline]
__se_sys_write fs/read_write.c:746 [inline]
__x64_sys_write+0x1fb/0x4d0 fs/read_write.c:746
x64_sys_call+0x30ab/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:2
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xd3/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
CPU: 0 UID: 0 PID: 6465 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(none)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 20:17 UTC
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/f9c5c5b791d385057… | |
| https://git.kernel.org/stable/c/64c71d60a21a9ed0a… | |
| https://git.kernel.org/stable/c/9e1c8c2a33d0a7b1f… | |
| https://git.kernel.org/stable/c/2f03dafea0a8096a2… | |
| https://git.kernel.org/stable/c/df5ffde9669314500… | |
| https://git.kernel.org/stable/c/b9f915340f25cae15… | |
| https://git.kernel.org/stable/c/81c734dae203757fb… | |
| https://cert-portal.siemens.com/productcert/html/… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
a9bc32879a08f23cdb80a48c738017e39aea1080 , < f9c5c5b791d3850570796f9e067629474e613796
(git)
Affected: af6b5c50d47ab43e5272ad61935d0ed2e264d3f0 , < 64c71d60a21a9ed0a802483dcd422b5b24eb1abe (git) Affected: d54e4da98bbfa8c257bdca94c49652d81d18a4d8 , < 9e1c8c2a33d0a7b1f637b5d0602fe56ed10166af (git) Affected: 350a6640fac4b53564ec20aa3f4a0922cb0ba5e6 , < 2f03dafea0a8096a2eb60f551218b360e5bab9a3 (git) Affected: 8d975c15c0cd744000ca386247432d57b21f9df0 , < df5ffde9669314500809bc498ae73d6d3d9519ac (git) Affected: 8d975c15c0cd744000ca386247432d57b21f9df0 , < b9f915340f25cae1562f18e1eb52deafca328414 (git) Affected: 8d975c15c0cd744000ca386247432d57b21f9df0 , < 81c734dae203757fb3c9eee6f9896386940776bd (git) Affected: c835df3bcc14858ae9b27315dd7de76370b94f3a (git) Affected: 5.10.210 , < 5.10.249 (semver) Affected: 5.15.149 , < 5.15.199 (semver) Affected: 6.1.77 , < 6.1.162 (semver) Affected: 6.6.16 , < 6.6.122 (semver) Affected: 6.7.4 , < 6.8 (semver) |
|
| Linux | Linux |
Affected:
6.8
Unaffected: 0 , < 6.8 (semver) Unaffected: 5.10.249 , ≤ 5.10.* (semver) Unaffected: 5.15.199 , ≤ 5.15.* (semver) Unaffected: 6.1.162 , ≤ 6.1.* (semver) Unaffected: 6.6.122 , ≤ 6.6.* (semver) Unaffected: 6.12.67 , ≤ 6.12.* (semver) Unaffected: 6.18.7 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix) |
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
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CVE-2026-43114 (GCVE-0-2026-43114)
Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-08-26 12:04
VLAI
EPSS
VEX
Title
netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
New test case fails unexpectedly when avx2 matching functions are used.
The test first loads a ranomly generated pipapo set
with 'ipv4 . port' key, i.e. nft -f foo.
This works. Then, it reloads the set after a flush:
(echo flush set t s; cat foo) | nft -f -
This is expected to work, because its the same set after all and it was
already loaded once.
But with avx2, this fails: nft reports a clashing element.
The reported clash is of following form:
We successfully re-inserted
a . b
c . d
Then we try to insert a . d
avx2 finds the already existing a . d, which (due to 'flush set') is marked
as invalid in the new generation. It skips the element and moves to next.
Due to incorrect masking, the skip-step finds the next matching
element *only considering the first field*,
i.e. we return the already reinserted "a . b", even though the
last field is different and the entry should not have been matched.
No such error is reported for the generic c implementation (no avx2) or when
the last field has to use the 'nft_pipapo_avx2_lookup_slow' fallback.
Bisection points to
7711f4bb4b36 ("netfilter: nft_set_pipapo: fix range overlap detection")
but that fix merely uncovers this bug.
Before this commit, the wrong element is returned, but erronously
reported as a full, identical duplicate.
The root-cause is too early return in the avx2 match functions.
When we process the last field, we should continue to process data
until the entire input size has been consumed to make sure no stale
bits remain in the map.
Severity
9.4 (Critical)
8.1 (High)
CWE
- CWE-480 - Use of Incorrect Operator
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/f8c39983fc9c1a978… | |
| https://git.kernel.org/stable/c/c7babe2f28b507e17… | |
| https://git.kernel.org/stable/c/1c43f0dd8691ddf88… | |
| https://git.kernel.org/stable/c/fa4f1f52528c73989… | |
| https://git.kernel.org/stable/c/3d53f9aafd469ae1e… | |
| https://git.kernel.org/stable/c/07de44424bb7f17ef… | |
| https://git.kernel.org/stable/c/0abbc43f71d99baad… | |
| https://git.kernel.org/stable/c/d3c0037ffe1273fa1… | |
| https://access.redhat.com/security/cve/CVE-2026-43114 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2466994 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:59723 | vendor-advisoryx_refsource_REDHAT |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
7400b063969bdca4a06cd97f1294d765c8eecbe1 , < f8c39983fc9c1a978c82e6f2df7bfba8a8561587
(git)
Affected: 7400b063969bdca4a06cd97f1294d765c8eecbe1 , < c7babe2f28b507e17f28e9f753b7caec72d4857f (git) Affected: 7400b063969bdca4a06cd97f1294d765c8eecbe1 , < 1c43f0dd8691ddf8884793b481ddc7511cf593c3 (git) Affected: 7400b063969bdca4a06cd97f1294d765c8eecbe1 , < fa4f1f52528c73989d820f32bfca06bec5afeece (git) Affected: 7400b063969bdca4a06cd97f1294d765c8eecbe1 , < 3d53f9aafd469ae1ea27051e00f5b96ca1b55d52 (git) Affected: 7400b063969bdca4a06cd97f1294d765c8eecbe1 , < 07de44424bb7f17ef9357e8535df96d9e97c40cb (git) Affected: 7400b063969bdca4a06cd97f1294d765c8eecbe1 , < 0abbc43f71d99baadeeba6fa3fe1c80b676f57ed (git) Affected: 7400b063969bdca4a06cd97f1294d765c8eecbe1 , < d3c0037ffe1273fa1961e779ff6906234d6cf53c (git) |
|
| Linux | Linux |
Affected:
5.7
Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.136 , ≤ 6.6.* (semver) Unaffected: 6.12.83 , ≤ 6.12.* (semver) Unaffected: 6.18.24 , ≤ 6.18.* (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:5.14.0-687.42.1.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
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CVE-2026-52920 (GCVE-0-2026-52920)
Vulnerability from cvelistv5 – Published: 2026-06-24 07:14 – Updated: 2026-08-05 12:31
VLAI
EPSS
VEX
Title
netfilter: xt_policy: fix strict mode inbound policy matching
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: xt_policy: fix strict mode inbound policy matching
match_policy_in() walks sec_path entries from the last transform to the
first one, but strict policy matching needs to consume info->pol[] in
the same forward order as the rule layout.
Derive the strict-match policy position from the number of transforms
already consumed so that multi-element inbound rules are matched
consistently.
Severity
8.3 (High)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/eb323f7b82d2e2f63… | |
| https://git.kernel.org/stable/c/fc1c518bb1f054831… | |
| https://git.kernel.org/stable/c/f98b7f85e04b40e28… | |
| https://git.kernel.org/stable/c/82664d0f1ba25e4f9… | |
| https://git.kernel.org/stable/c/b130a6eefa02bd4d4… | |
| https://git.kernel.org/stable/c/938867e870fb5471b… | |
| https://git.kernel.org/stable/c/392cc1d8408b56652… | |
| https://git.kernel.org/stable/c/4b2b4d7d4e203c92d… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < eb323f7b82d2e2f638de0cc2a177803eb20e0707
(git)
Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < fc1c518bb1f054831ecabb32da9b8e1dff9699c6 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < f98b7f85e04b40e28b08c461ded0cc79f14f5509 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < 82664d0f1ba25e4f9a71994954abae24c60f4067 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < 938867e870fb5471bb16f442aeac81326e05bf65 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < 392cc1d8408b5665215c1e9290bbf0f92339b043 (git) Affected: c4b885139203d37f76662c37ae645fe8e0f4e4e5 , < 4b2b4d7d4e203c92db8966b163edfacb1f0e1e29 (git) |
|
| Linux | Linux |
Affected:
2.6.17
Unaffected: 0 , < 2.6.17 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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CVE-2026-52924 (GCVE-0-2026-52924)
Vulnerability from cvelistv5 – Published: 2026-06-24 07:14 – Updated: 2026-08-26 12:04
VLAI
EPSS
VEX
Title
sctp: purge outqueue on stale COOKIE-ECHO handling
Summary
In the Linux kernel, the following vulnerability has been resolved:
sctp: purge outqueue on stale COOKIE-ECHO handling
sctp_stream_update() is only invoked when the association is moved into
COOKIE_WAIT during association setup/reconfiguration. In this path, the
outbound stream scheduler state (stream->out_curr) is expected to be
clean, since no user data should have been transmitted yet unless the
state machine has already partially progressed.
However, a corner case exists in sctp_sf_do_5_2_6_stale(): when a
Stale Cookie ERROR is received, the association is rolled back from
COOKIE_ECHOED to COOKIE_WAIT. In this scenario, user data may already
have been queued and even bundled with the COOKIE-ECHO chunk.
During the rollback, sctp_stream_update() frees the old stream table
and installs a new one, but it does not invalidate stream->out_curr.
As a result, out_curr may still point to a freed sctp_stream_out
entry from the previous stream state.
Later, SCTP scheduler dequeue paths (FCFS, RR, PRIO, etc.) rely on
stream->out_curr->ext, which can lead to use-after-free once the old
stream state has been released via sctp_stream_free().
This results in crashes such as (reported by Yuqi):
BUG: KASAN: slab-use-after-free in sctp_sched_fcfs_dequeue+0x13a/0x140
Read of size 8 at addr ff1100004d4d3208 by task mini_poc/9312
CPU: 1 UID: 1001 PID: 9312 Comm: mini_poc Not tainted
7.1.0-rc1-00305-gbd3a4795d574 #5 PREEMPT(full)
sctp_sched_fcfs_dequeue+0x13a/0x140
sctp_outq_flush+0x1603/0x33e0
sctp_do_sm+0x31c9/0x5d30
sctp_assoc_bh_rcv+0x392/0x6f0
sctp_inq_push+0x1db/0x270
sctp_rcv+0x138d/0x3c10
Fix this by fully purging the association outqueue when handling the
Stale Cookie case. This ensures all pending transmit and retransmit
state is dropped, and any scheduler cached pointers are invalidated,
making it safe to rebuild stream state during COOKIE_WAIT restart.
Updating only stream->out_curr would be insufficient, since queued
and retransmittable data would still reference the old stream state and
trigger later use-after-free in dequeue paths.
Severity
9.8 (Critical)
CWE
- CWE-825 - Expired Pointer Dereference
Assigner
References
14 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/84b7a319105db2f91… | |
| https://git.kernel.org/stable/c/f46e1d1a758878f0d… | |
| https://git.kernel.org/stable/c/3c0741a441a7df709… | |
| https://git.kernel.org/stable/c/2afc9e684dc7fecf7… | |
| https://git.kernel.org/stable/c/1d4652f677906a644… | |
| https://git.kernel.org/stable/c/a6207349e703cfc04… | |
| https://git.kernel.org/stable/c/83ade59e5da365f4b… | |
| https://git.kernel.org/stable/c/e374b22e9b07b72a2… | |
| https://access.redhat.com/security/cve/CVE-2026-52924 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2492095 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:59723 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:59821 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:59737 | vendor-advisoryx_refsource_REDHAT |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < 84b7a319105db2f917ccdcf502bdc866082b1285
(git)
Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < f46e1d1a758878f0d22c4fbbd1bf42bb7165d1e8 (git) Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < 3c0741a441a7df7099d7ca6a64a6a0de09c677c8 (git) Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < 2afc9e684dc7fecf73db1edc937ebbc47b4b68dc (git) Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < 1d4652f677906a64487c13f9ace54b0eb263b5d0 (git) Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < a6207349e703cfc04756a4d16dec9176135813a5 (git) Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < 83ade59e5da365f4bf8bce72c5a38774202b442f (git) Affected: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 , < e374b22e9b07b72a25909621464ff74096151bfb (git) |
|
| Linux | Linux |
Affected:
4.15
Unaffected: 0 , < 4.15 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:4.18.0-553.158.1.rt7.499.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::nfv |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:4.18.0-553.158.1.el8_10 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:5.14.0-687.42.1.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
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CVE-2026-53131 (GCVE-0-2026-53131)
Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-08-05 12:33
VLAI
EPSS
VEX
Title
netfilter: require Ethernet MAC header before using eth_hdr()
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: require Ethernet MAC header before using eth_hdr()
`ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and
`hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)`
after either assuming that the skb is associated with an Ethernet
device or checking only that the `ETH_HLEN` bytes at
`skb_mac_header(skb)` lie between `skb->head` and `skb->data`.
Make these paths first verify that the skb is associated with an
Ethernet device, that the MAC header was set, and that it spans at
least a full Ethernet header before accessing `eth_hdr(skb)`.
Severity
9.4 (Critical)
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/4435888e1bf139d2b… | |
| https://git.kernel.org/stable/c/063f43361e884acd7… | |
| https://git.kernel.org/stable/c/726abf97566867f80… | |
| https://git.kernel.org/stable/c/367abcacc13a8e2e7… | |
| https://git.kernel.org/stable/c/5d634afb8b83b49de… | |
| https://git.kernel.org/stable/c/cea435ea7e868ea6f… | |
| https://git.kernel.org/stable/c/62443dc21114c0bbc… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4435888e1bf139d2bfe5911643d4217382136743
(git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 063f43361e884acd7300790e90194430275d0d0c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 726abf97566867f808fec9d8a408eb9698bd570a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 367abcacc13a8e2e7624408b7f593bd1e60e49d9 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5d634afb8b83b49de562792fd0d047416a43bd4d (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cea435ea7e868ea6fdf039bc4f2090c1d829b556 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 62443dc21114c0bbc476fa62973db89743f2f137 (git) |
|
| Linux | Linux |
Affected:
2.6.12
Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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CVE-2026-53185 (GCVE-0-2026-53185)
Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-08-26 12:04
VLAI
EPSS
VEX
Title
zram: fix use-after-free in zram_bvec_write_partial()
Summary
In the Linux kernel, the following vulnerability has been resolved:
zram: fix use-after-free in zram_bvec_write_partial()
zram_read_page() picks the sync or async backing device read path based on
whether the parent bio is NULL. zram_bvec_write_partial() passes its
parent bio down, so for ZRAM_WB slots the read is dispatched
asynchronously and zram_read_page() returns 0 while the bio is still in
flight. The caller then runs memcpy_from_bvec(), zram_write_page() and
__free_page() on the buffer, leaving the async read to write into a freed
page.
zram_bvec_read_partial() was switched to NULL in commit 4e3c87b9421d
("zram: fix synchronous reads") for the same reason; the write_partial
counterpart was missed.
Severity
CWE
- CWE-364 - Signal Handler Race Condition
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/0c2821665ff71be3f… | |
| https://git.kernel.org/stable/c/77a602b505ce48029… | |
| https://git.kernel.org/stable/c/c96786d6ff1acc1d5… | |
| https://git.kernel.org/stable/c/198b5a14cca27263b… | |
| https://git.kernel.org/stable/c/732fd9f0b9c1cdc6d… | |
| https://access.redhat.com/security/cve/CVE-2026-53185 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2492735 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:59723 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8e654f8fbff52ac483fb69957222853d7e2fc588 , < 0c2821665ff71be3f4b07ecece384669f2877f6a
(git)
Affected: 8e654f8fbff52ac483fb69957222853d7e2fc588 , < 77a602b505ce4802915853cfc435a4722fab3e64 (git) Affected: 8e654f8fbff52ac483fb69957222853d7e2fc588 , < c96786d6ff1acc1d54d9241e97767554c1dfdd5b (git) Affected: 8e654f8fbff52ac483fb69957222853d7e2fc588 , < 198b5a14cca27263b9c14b20114c8092de15dfcb (git) Affected: 8e654f8fbff52ac483fb69957222853d7e2fc588 , < 732fd9f0b9c1cdc6dfd77162ded60df005182cc0 (git) |
|
| Linux | Linux |
Affected:
4.14
Unaffected: 0 , < 4.14 (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:5.14.0-687.42.1.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
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CVE-2026-53268 (GCVE-0-2026-53268)
Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-08-05 12:34
VLAI
EPSS
VEX
Title
netfilter: conntrack_irc: fix possible out-of-bounds read
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: conntrack_irc: fix possible out-of-bounds read
When parsing fails after we've matched the command string we
should bail out instead of trying to match a different command.
This helper should be deprecated, given prevalence of TLS I doubt it has
any relevance in 2026.
Severity
8.2 (High)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/4cdda7f868f48e2f8… | |
| https://git.kernel.org/stable/c/8a1d6e40dedfe1068… | |
| https://git.kernel.org/stable/c/0afc802160af0df61… | |
| https://git.kernel.org/stable/c/7c34f913052920832… | |
| https://git.kernel.org/stable/c/ddddd8271359961e4… | |
| https://git.kernel.org/stable/c/9e5da2379f968a3ea… | |
| https://git.kernel.org/stable/c/573810f61bcd6b681… | |
| https://git.kernel.org/stable/c/66eba0ffce3b7e114… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
869f37d8e48f3911eb70f38a994feaa8f8380008 , < 4cdda7f868f48e2f81579371584fdbdce37df2c8
(git)
Affected: 869f37d8e48f3911eb70f38a994feaa8f8380008 , < 8a1d6e40dedfe1068aee094d851bd69e289c9fd6 (git) Affected: 869f37d8e48f3911eb70f38a994feaa8f8380008 , < 0afc802160af0df61ed374fdb97fb34cfe5cdf2f (git) Affected: 869f37d8e48f3911eb70f38a994feaa8f8380008 , < 7c34f91305292083253df6a9f6c8ede02d4ccaea (git) Affected: 869f37d8e48f3911eb70f38a994feaa8f8380008 , < ddddd8271359961e403d11c90c9ba9fc38914f7e (git) Affected: 869f37d8e48f3911eb70f38a994feaa8f8380008 , < 9e5da2379f968a3ea5a6e38921ab6201576466dc (git) Affected: 869f37d8e48f3911eb70f38a994feaa8f8380008 , < 573810f61bcd6b6815e2ff53bbdd2b9c9d747176 (git) Affected: 869f37d8e48f3911eb70f38a994feaa8f8380008 , < 66eba0ffce3b7e11449946b4cbbef8ea36112f56 (git) |
|
| Linux | Linux |
Affected:
2.6.20
Unaffected: 0 , < 2.6.20 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64189 (GCVE-0-2026-64189)
Vulnerability from cvelistv5 – Published: 2026-07-20 16:27 – Updated: 2026-08-17 04:51
VLAI
EPSS
VEX
Title
netfilter: ipset: fix race between dump and ip_set_list resize
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: fix race between dump and ip_set_list resize
The release path of ip_set_dump_do() and ip_set_dump_done() read
inst->ip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw()
of the array pointer. These run from netlink_recvmsg() without the nfnl
mutex and without an RCU read-side critical section.
A concurrent ip_set_create() can grow the array: it publishes the new
array, calls synchronize_net() and then kvfree()s the old one. Since the
dump paths read the array outside any RCU reader, synchronize_net() does
not wait for them and the old array can be freed while they still index
into it, causing a use-after-free.
The dumped set itself stays pinned via set->ref_netlink, so only the
array load needs protecting. Take rcu_read_lock() around it, matching
ip_set_get_byname() and __ip_set_put_byindex().
BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)
Read of size 8 at addr ffff88800b5c4018 by task exploit/150
Call Trace:
...
kasan_report (mm/kasan/report.c:595)
ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)
netlink_dump (net/netlink/af_netlink.c:2325)
netlink_recvmsg (net/netlink/af_netlink.c:1976)
sock_recvmsg (net/socket.c:1159)
__sys_recvfrom (net/socket.c:2315)
...
Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7]
RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698)
Kernel panic - not syncing: Fatal exception
Severity
7.8 (High)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/a7a29927795968320… | |
| https://git.kernel.org/stable/c/1bc67c3fc98e9fc07… | |
| https://git.kernel.org/stable/c/e8a9976b61f1bc4aa… | |
| https://git.kernel.org/stable/c/96fbafc20ebd9a613… | |
| https://git.kernel.org/stable/c/ff86ea9b7fdf70564… | |
| https://git.kernel.org/stable/c/81d54c766337b923e… | |
| https://git.kernel.org/stable/c/e8ee198bbc04a32d3… | |
| https://git.kernel.org/stable/c/7cd9103283b26b917… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < a7a299277959683204d73333c32c092fd69327d4
(git)
Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < 1bc67c3fc98e9fc07032cc56afcdbc690c47d11e (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < e8a9976b61f1bc4aa7fd25fa26726dfdf2adf710 (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < 96fbafc20ebd9a613736c2998b89c539fe3042f5 (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < ff86ea9b7fdf70564e60436fbee68c96bc459943 (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < 81d54c766337b923eec26da0a13406760b091093 (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < e8ee198bbc04a32d336e79160fde980e0235b39f (git) Affected: 8a02bdd50b2ecb6d62121d2958d3ea186cc88ce7 , < 7cd9103283b26b917360ec99d7d2f2d761bcf1ab (git) Affected: 2f6bf7917f55f9dae913193e49672b3598620eab (git) Affected: 4.19.5 , < 4.20 (semver) |
|
| Linux | Linux |
Affected:
4.20
Unaffected: 0 , < 4.20 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: fix race between dump and ip_set_list resize\n\nThe release path of ip_set_dump_do() and ip_set_dump_done() read\ninst-\u003eip_set_list via ip_set_ref_netlink(), a plain rcu_dereference_raw()\nof the array pointer. These run from netlink_recvmsg() without the nfnl\nmutex and without an RCU read-side critical section.\n\nA concurrent ip_set_create() can grow the array: it publishes the new\narray, calls synchronize_net() and then kvfree()s the old one. Since the\ndump paths read the array outside any RCU reader, synchronize_net() does\nnot wait for them and the old array can be freed while they still index\ninto it, causing a use-after-free.\n\nThe dumped set itself stays pinned via set-\u003eref_netlink, so only the\narray load needs protecting. Take rcu_read_lock() around it, matching\nip_set_get_byname() and __ip_set_put_byindex().\n\n BUG: KASAN: slab-use-after-free in ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n Read of size 8 at addr ffff88800b5c4018 by task exploit/150\n Call Trace:\n ...\n kasan_report (mm/kasan/report.c:595)\n ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1697)\n netlink_dump (net/netlink/af_netlink.c:2325)\n netlink_recvmsg (net/netlink/af_netlink.c:1976)\n sock_recvmsg (net/socket.c:1159)\n __sys_recvfrom (net/socket.c:2315)\n ...\n Oops: general protection fault, probably for non-canonical address ... KASAN NOPTI\n KASAN: maybe wild-memory-access in range [0x02d6...d0-0x02d6...d7]\n RIP: 0010:ip_set_dump_do (net/netfilter/ipset/ip_set_core.c:1698)\n Kernel panic - not syncing: Fatal exception"
}
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"url": "https://git.kernel.org/stable/c/7cd9103283b26b917360ec99d7d2f2d761bcf1ab"
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"title": "netfilter: ipset: fix race between dump and ip_set_list resize",
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"datePublished": "2026-07-20T16:27:47.767Z",
"dateReserved": "2026-07-19T07:54:57.040Z",
"dateUpdated": "2026-08-17T04:51:49.683Z",
"state": "PUBLISHED"
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CVE-2026-64191 (GCVE-0-2026-64191)
Vulnerability from cvelistv5 – Published: 2026-07-20 16:27 – Updated: 2026-08-05 12:39
VLAI
EPSS
VEX
Title
i2c: stub: Reject I2C block transfers with invalid length
Summary
In the Linux kernel, the following vulnerability has been resolved:
i2c: stub: Reject I2C block transfers with invalid length
The I2C_SMBUS_I2C_BLOCK_DATA case in stub_xfer() uses data->block[0]
as the transfer length. The existing check only clamps it to avoid
overrunning the chip->words[256] register array, but does not validate
it against I2C_SMBUS_BLOCK_MAX (32), which is the limit of the union
i2c_smbus_data.block buffer (34 bytes total). The driver is a
development/test tool (CONFIG_I2C_STUB=m, not built by default)
that must be loaded with a chip_addr= parameter.
A local user with access to /dev/i2c-* can issue an I2C_SMBUS ioctl
with I2C_SMBUS_I2C_BLOCK_DATA and data->block[0] > 32, causing
stub_xfer() to read or write past the end of the union
i2c_smbus_data.block buffer:
BUG: KASAN: stack-out-of-bounds in stub_xfer (drivers/i2c/i2c-stub.c:223)
Read of size 1 at addr ffff88800abcfd92 by task exploit/81
Call Trace:
<TASK>
stub_xfer (drivers/i2c/i2c-stub.c:223)
__i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:593)
i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:536)
i2cdev_ioctl_smbus (drivers/i2c/i2c-dev.c:391)
i2cdev_ioctl (drivers/i2c/i2c-dev.c:478)
__x64_sys_ioctl (fs/ioctl.c:583)
do_syscall_64 (arch/x86/entry/syscall_64.c:94)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
</TASK>
The bug exists because i2c-stub implements .smbus_xfer directly,
bypassing the I2C_SMBUS_BLOCK_MAX validation in
i2c_smbus_xfer_emulated(). The I2C_SMBUS_BLOCK_DATA case in the same
function correctly validates against I2C_SMBUS_BLOCK_MAX, but the
I2C_SMBUS_I2C_BLOCK_DATA case does not.
Fix by rejecting transfers with data->block[0] == 0 or
data->block[0] > I2C_SMBUS_BLOCK_MAX with -EINVAL, consistent with
both the I2C_SMBUS_BLOCK_DATA case in the same function and the
I2C_SMBUS_I2C_BLOCK_DATA validation in i2c_smbus_xfer_emulated().
Severity
7.8 (High)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/7e9072dbd5f2f1793… | |
| https://git.kernel.org/stable/c/21e87f336ac6303fe… | |
| https://git.kernel.org/stable/c/3fd225f3e4cd67ec8… | |
| https://git.kernel.org/stable/c/1c4ffe6b4f0436548… | |
| https://git.kernel.org/stable/c/4bd8635f28c135a08… | |
| https://git.kernel.org/stable/c/5f4d2bd028ebb6e4c… | |
| https://git.kernel.org/stable/c/0526931b16e5a118d… | |
| https://git.kernel.org/stable/c/6036b5067a8199ba7… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
4710317891e4824ce1510a6b5066abbd3e917750 , < 7e9072dbd5f2f17934751873450d2c22080ead80
(git)
Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 21e87f336ac6303fed54a69b1d0d79a23b25c8d0 (git) Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 3fd225f3e4cd67ec8ddab1afed9da03c7c43537c (git) Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 1c4ffe6b4f04365485ed58d64c9bb86b46fc9037 (git) Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 4bd8635f28c135a08aac6badcd7d9b5cdb34335f (git) Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 5f4d2bd028ebb6e4c09a9d64842546022321d4a7 (git) Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 0526931b16e5a118d367b7bfce7d797e63f7ac69 (git) Affected: 4710317891e4824ce1510a6b5066abbd3e917750 , < 6036b5067a8199ba7a2dc7b377d4b9dd276d5f9e (git) |
|
| Linux | Linux |
Affected:
2.6.33
Unaffected: 0 , < 2.6.33 (semver) Unaffected: 5.10.260 , ≤ 5.10.* (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.37 , ≤ 6.18.* (semver) Unaffected: 7.0.14 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.95",
"versionStartIncluding": "2.6.33",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.37",
"versionStartIncluding": "2.6.33",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0.14",
"versionStartIncluding": "2.6.33",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1",
"versionStartIncluding": "2.6.33",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: stub: Reject I2C block transfers with invalid length\n\nThe I2C_SMBUS_I2C_BLOCK_DATA case in stub_xfer() uses data-\u003eblock[0]\nas the transfer length. The existing check only clamps it to avoid\noverrunning the chip-\u003ewords[256] register array, but does not validate\nit against I2C_SMBUS_BLOCK_MAX (32), which is the limit of the union\ni2c_smbus_data.block buffer (34 bytes total). The driver is a\ndevelopment/test tool (CONFIG_I2C_STUB=m, not built by default)\nthat must be loaded with a chip_addr= parameter.\n\nA local user with access to /dev/i2c-* can issue an I2C_SMBUS ioctl\nwith I2C_SMBUS_I2C_BLOCK_DATA and data-\u003eblock[0] \u003e 32, causing\nstub_xfer() to read or write past the end of the union\ni2c_smbus_data.block buffer:\n\n BUG: KASAN: stack-out-of-bounds in stub_xfer (drivers/i2c/i2c-stub.c:223)\n Read of size 1 at addr ffff88800abcfd92 by task exploit/81\n Call Trace:\n \u003cTASK\u003e\n stub_xfer (drivers/i2c/i2c-stub.c:223)\n __i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:593)\n i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:536)\n i2cdev_ioctl_smbus (drivers/i2c/i2c-dev.c:391)\n i2cdev_ioctl (drivers/i2c/i2c-dev.c:478)\n __x64_sys_ioctl (fs/ioctl.c:583)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n \u003c/TASK\u003e\n\nThe bug exists because i2c-stub implements .smbus_xfer directly,\nbypassing the I2C_SMBUS_BLOCK_MAX validation in\ni2c_smbus_xfer_emulated(). The I2C_SMBUS_BLOCK_DATA case in the same\nfunction correctly validates against I2C_SMBUS_BLOCK_MAX, but the\nI2C_SMBUS_I2C_BLOCK_DATA case does not.\n\nFix by rejecting transfers with data-\u003eblock[0] == 0 or\ndata-\u003eblock[0] \u003e I2C_SMBUS_BLOCK_MAX with -EINVAL, consistent with\nboth the I2C_SMBUS_BLOCK_DATA case in the same function and the\nI2C_SMBUS_I2C_BLOCK_DATA validation in i2c_smbus_xfer_emulated()."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"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"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable path is reached by a local process issuing I2C_SMBUS ioctls on an i2c-stub /dev/i2c-* character device; it is neither remotely nor physically reachable.\nAC:L - Once i2c-stub is loaded, the attacker controls the address, direction, length, and register contents, making the corruption deterministic without a race. The non-default module configuration defines the vulnerable deployment rather than complicating exploitation within it.\nPR:L - The attacker needs unprivileged local access to the applicable /dev/i2c-* node, but no capability or namespace-specific administrative privilege is checked anywhere along the ioctl path.\nUI:N - After the vulnerable adapter is configured, exploitation requires only attacker-issued ioctls and no action by another user.\nS:U - The corruption occurs within the host kernel and represents conventional local privilege escalation, without crossing a separate virtualization or hardware security authority.\nC:H - An oversized block write reads up to 222 bytes beyond the 34-byte stack union and persists those bytes in attacker-readable stub registers, enabling substantial kernel-stack disclosure.\nI:H - An oversized block read writes up to 222 attacker-chosen bytes beyond the stack union because the attacker can prepopulate the stub registers, enabling control-data corruption and potential kernel code execution.\nA:H - The controlled stack overwrite can corrupt stack canaries, return state, or other control data, causing a repeatable kernel oops or panic even when code execution is unsuccessful."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:39:59.861Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/7e9072dbd5f2f17934751873450d2c22080ead80"
},
{
"url": "https://git.kernel.org/stable/c/21e87f336ac6303fed54a69b1d0d79a23b25c8d0"
},
{
"url": "https://git.kernel.org/stable/c/3fd225f3e4cd67ec8ddab1afed9da03c7c43537c"
},
{
"url": "https://git.kernel.org/stable/c/1c4ffe6b4f04365485ed58d64c9bb86b46fc9037"
},
{
"url": "https://git.kernel.org/stable/c/4bd8635f28c135a08aac6badcd7d9b5cdb34335f"
},
{
"url": "https://git.kernel.org/stable/c/5f4d2bd028ebb6e4c09a9d64842546022321d4a7"
},
{
"url": "https://git.kernel.org/stable/c/0526931b16e5a118d367b7bfce7d797e63f7ac69"
},
{
"url": "https://git.kernel.org/stable/c/6036b5067a8199ba7a2dc7b377d4b9dd276d5f9e"
}
],
"title": "i2c: stub: Reject I2C block transfers with invalid length",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64191",
"datePublished": "2026-07-20T16:27:51.120Z",
"dateReserved": "2026-07-19T07:54:57.040Z",
"dateUpdated": "2026-08-05T12:39:59.861Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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