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ALSA-2025:14009 (CVE-2025-21867)
Vulnerability from osv_almalinux – Published: 2025-08-18 00:00 – Updated: 2025-09-04 09:42 – Source websiteThe kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
- kernel: bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() (CVE-2025-21867)
- kernel: net: fix udp gso skb_segment after pull from frag_list (CVE-2025-38124)
- kernel: Bluetooth: hci_core: Fix use-after-free in vhci_flush() (CVE-2025-38250)
- kernel: i2c/designware: Fix an initialization issue (CVE-2025-38380)
- kernel: tls: always refresh the queue when reading sock (CVE-2025-38471)
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.
{
"affected": [
{
"package": {
"ecosystem": "AlmaLinux:10",
"name": "kernel-abi-stablelists"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.12.0-55.28.1.el10_0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:10",
"name": "kernel-doc"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.12.0-55.28.1.el10_0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"details": "The kernel packages contain the Linux kernel, the core of any Linux operating system. \n\nSecurity Fix(es): \n\n * kernel: bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() (CVE-2025-21867)\n * kernel: net: fix udp gso skb_segment after pull from frag_list (CVE-2025-38124)\n * kernel: Bluetooth: hci_core: Fix use-after-free in vhci_flush() (CVE-2025-38250)\n * kernel: i2c/designware: Fix an initialization issue (CVE-2025-38380)\n * kernel: tls: always refresh the queue when reading sock (CVE-2025-38471)\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-2025:14009",
"modified": "2025-09-04T09:42:53Z",
"published": "2025-08-18T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2025:14009"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-21867"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-38124"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-38250"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-38380"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-38471"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2355334"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2376041"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2378982"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2383381"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2383893"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/10/ALSA-2025-14009.html"
}
],
"related": [
"CVE-2025-21867",
"CVE-2025-38124",
"CVE-2025-38250",
"CVE-2025-38380",
"CVE-2025-38471"
],
"schema_version": "1.7.0",
"summary": "Important: kernel security update",
"upstream": [
"CVE-2025-21867",
"CVE-2025-38124",
"CVE-2025-38250",
"CVE-2025-38380",
"CVE-2025-38471"
]
}
CVE-2025-21867 (GCVE-0-2025-21867)
Vulnerability from cvelistv5 – Published: 2025-03-27 13:38 – Updated: 2026-10-15 01:04- CWE-416 - Use After Free
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/f615fccfc689cb489… | |
| https://git.kernel.org/stable/c/d56d8a23d95100b65… | |
| https://git.kernel.org/stable/c/972bafed67ca73ad9… | |
| https://git.kernel.org/stable/c/1a9e1284e87d59b13… | |
| https://git.kernel.org/stable/c/6b3d638ca897e099f… | |
| https://lists.debian.org/debian-lts-announce/2025… | |
| https://cert-portal.siemens.com/productcert/html/… | |
| https://cert-portal.siemens.com/productcert/html/… |
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
be3d72a2896cb24090f268dce4aa8a304d40bc23 , < f615fccfc689cb48977d275ac2e391297b52392b
(git)
Affected: be3d72a2896cb24090f268dce4aa8a304d40bc23 , < d56d8a23d95100b65f40438639dd82db2af81c11 (git) Affected: be3d72a2896cb24090f268dce4aa8a304d40bc23 , < 972bafed67ca73ad9a56448384281eb5fd5c0ba3 (git) Affected: be3d72a2896cb24090f268dce4aa8a304d40bc23 , < 1a9e1284e87d59b1303b69d1808d310821d6e5f7 (git) Affected: be3d72a2896cb24090f268dce4aa8a304d40bc23 , < 6b3d638ca897e099fa99bd6d02189d3176f80a47 (git) |
|
| Linux | Linux |
Affected:
5.18
Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.130 , ≤ 6.1.* (semver) Unaffected: 6.6.80 , ≤ 6.6.* (semver) Unaffected: 6.12.17 , ≤ 6.12.* (semver) Unaffected: 6.13.5 , ≤ 6.13.* (semver) Unaffected: 6.14 , ≤ * (original_commit_for_fix) |
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.7 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.7 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.7 , < *
(custom)
|
{
"containers": {
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"metrics": [
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"cvssV3_1": {
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
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"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
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"options": [
{
"Exploitation": "none"
},
{
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},
{
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],
"role": "CISA Coordinator",
"timestamp": "2025-03-28T17:27:05.715395Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
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"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
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"references": [
{
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}
],
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{
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},
{
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"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
"vendor": "Siemens",
"versions": [
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"version": "V3.1.6",
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]
},
{
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"vendor": "Siemens",
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}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-15T01:04:59.661Z",
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"shortName": "siemens-SADP"
},
"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
}
],
"x_adpType": "supplier"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/bpf/test_run.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "f615fccfc689cb48977d275ac2e391297b52392b",
"status": "affected",
"version": "be3d72a2896cb24090f268dce4aa8a304d40bc23",
"versionType": "git"
},
{
"lessThan": "d56d8a23d95100b65f40438639dd82db2af81c11",
"status": "affected",
"version": "be3d72a2896cb24090f268dce4aa8a304d40bc23",
"versionType": "git"
},
{
"lessThan": "972bafed67ca73ad9a56448384281eb5fd5c0ba3",
"status": "affected",
"version": "be3d72a2896cb24090f268dce4aa8a304d40bc23",
"versionType": "git"
},
{
"lessThan": "1a9e1284e87d59b1303b69d1808d310821d6e5f7",
"status": "affected",
"version": "be3d72a2896cb24090f268dce4aa8a304d40bc23",
"versionType": "git"
},
{
"lessThan": "6b3d638ca897e099fa99bd6d02189d3176f80a47",
"status": "affected",
"version": "be3d72a2896cb24090f268dce4aa8a304d40bc23",
"versionType": "git"
}
]
},
{
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"product": "Linux",
"programFiles": [
"net/bpf/test_run.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.18"
},
{
"lessThan": "5.18",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.130",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.80",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.17",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.13.*",
"status": "unaffected",
"version": "6.13.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.130",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.80",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.17",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.13.5",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.14",
"versionStartIncluding": "5.18",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, test_run: Fix use-after-free issue in eth_skb_pkt_type()\n\nKMSAN reported a use-after-free issue in eth_skb_pkt_type()[1]. The\ncause of the issue was that eth_skb_pkt_type() accessed skb\u0027s data\nthat didn\u0027t contain an Ethernet header. This occurs when\nbpf_prog_test_run_xdp() passes an invalid value as the user_data\nargument to bpf_test_init().\n\nFix this by returning an error when user_data is less than ETH_HLEN in\nbpf_test_init(). Additionally, remove the check for \"if (user_size \u003e\nsize)\" as it is unnecessary.\n\n[1]\nBUG: KMSAN: use-after-free in eth_skb_pkt_type include/linux/etherdevice.h:627 [inline]\nBUG: KMSAN: use-after-free in eth_type_trans+0x4ee/0x980 net/ethernet/eth.c:165\n eth_skb_pkt_type include/linux/etherdevice.h:627 [inline]\n eth_type_trans+0x4ee/0x980 net/ethernet/eth.c:165\n __xdp_build_skb_from_frame+0x5a8/0xa50 net/core/xdp.c:635\n xdp_recv_frames net/bpf/test_run.c:272 [inline]\n xdp_test_run_batch net/bpf/test_run.c:361 [inline]\n bpf_test_run_xdp_live+0x2954/0x3330 net/bpf/test_run.c:390\n bpf_prog_test_run_xdp+0x148e/0x1b10 net/bpf/test_run.c:1318\n bpf_prog_test_run+0x5b7/0xa30 kernel/bpf/syscall.c:4371\n __sys_bpf+0x6a6/0xe20 kernel/bpf/syscall.c:5777\n __do_sys_bpf kernel/bpf/syscall.c:5866 [inline]\n __se_sys_bpf kernel/bpf/syscall.c:5864 [inline]\n __x64_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:5864\n x64_sys_call+0x2ea0/0x3d90 arch/x86/include/generated/asm/syscalls_64.h:322\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xd9/0x1d0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUninit was created at:\n free_pages_prepare mm/page_alloc.c:1056 [inline]\n free_unref_page+0x156/0x1320 mm/page_alloc.c:2657\n __free_pages+0xa3/0x1b0 mm/page_alloc.c:4838\n bpf_ringbuf_free kernel/bpf/ringbuf.c:226 [inline]\n ringbuf_map_free+0xff/0x1e0 kernel/bpf/ringbuf.c:235\n bpf_map_free kernel/bpf/syscall.c:838 [inline]\n bpf_map_free_deferred+0x17c/0x310 kernel/bpf/syscall.c:862\n process_one_work kernel/workqueue.c:3229 [inline]\n process_scheduled_works+0xa2b/0x1b60 kernel/workqueue.c:3310\n worker_thread+0xedf/0x1550 kernel/workqueue.c:3391\n kthread+0x535/0x6b0 kernel/kthread.c:389\n ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n\nCPU: 1 UID: 0 PID: 17276 Comm: syz.1.16450 Not tainted 6.12.0-05490-g9bb88c659673 #8\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014"
}
],
"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 vulnerability is triggered through the local `bpf(BPF_PROG_TEST_RUN)` syscall with `BPF_F_TEST_XDP_LIVE_FRAMES` and a short `data_size_in`; no network input reaches this code. Per kernel scoring guidance, BPF syscall-reachable bugs are Local.\nAC:L - The attacker fully controls `data_size_in`, `batch_size`, `repeat` and the XDP program, so the out-of-range read is triggered deterministically on every invocation with no race to win. Page-pool pages are freshly allocated non-zeroed pages, and the attacker can groom which freed pages get recycled by freeing chosen content immediately beforehand.\nPR:L - `bpf_prog_test_run()` performs no capability check whatsoever \u2014 the only gate is possession of an XDP program fd, which an unprivileged process can obtain via a delegated BPF token (`bpf_token_capable()` falls back to `ns_capable(token-\u003euserns, ...)`) or a bpffs pin, since `bpf_obj_do_get()` checks only file permissions. Loading a fresh XDP program needs CAP_BPF+CAP_NET_ADMIN, but that is a container/namespace-level privilege rather than real init-namespace root, so Low is the appropriate and higher-severity choice.\nUI:N - The attacker performs the entire sequence itself via the `bpf()` syscall; no victim action, mount, or file open is needed. The XDP frames are looped straight back into the local receive path by the test-run machinery.\nS:U - The stale-memory read, the disclosed data, and the resulting malformed skb all remain within the kernel\u0027s own security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - `eth_skb_pkt_type()`/`eth_type_trans()` read the contents of a previously-freed page, and the derived `skb-\u003eprotocol` and `skb-\u003epkt_type` are directly readable by an `AF_PACKET` observer on loopback, giving a repeatable, unbounded oracle over recycled kernel memory that may contain pointers, keys, or user data. Per guidance, use-after-free reads of freed memory are scored High.\nI:H - Contents of freed memory \u2014 which the attacker can influence through heap grooming \u2014 become the Ethernet header that determines `skb-\u003eprotocol` and `skb-\u003epkt_type` for a frame injected into the local network stack via `netif_receive_skb_list()`, corrupting packet classification and delivery. Per guidance, use-after-free conditions are scored High for integrity.\nA:H - The kernel dereferences memory beyond the initialized frame and hands a geometrically invalid skb (`skb-\u003elen \u003c ETH_HLEN`, `mac_header == network_header`, `mac_len == 0`) to protocol handlers that assume `eth_type_trans()` pulled the header, and on hardened/KASAN/KMSAN builds the freed-page access itself is a fatal memory-error report. Per guidance, any use-after-free is scored High for availability."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T11:54:59.299Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/f615fccfc689cb48977d275ac2e391297b52392b"
},
{
"url": "https://git.kernel.org/stable/c/d56d8a23d95100b65f40438639dd82db2af81c11"
},
{
"url": "https://git.kernel.org/stable/c/972bafed67ca73ad9a56448384281eb5fd5c0ba3"
},
{
"url": "https://git.kernel.org/stable/c/1a9e1284e87d59b1303b69d1808d310821d6e5f7"
},
{
"url": "https://git.kernel.org/stable/c/6b3d638ca897e099fa99bd6d02189d3176f80a47"
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CVE-2025-38124 (GCVE-0-2025-38124)
Vulnerability from cvelistv5 – Published: 2025-07-03 08:35 – Updated: 2026-10-15 01:06| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/0e65f38bd1aa14ea8… | |
| https://git.kernel.org/stable/c/85eef1748c024da1a… | |
| https://git.kernel.org/stable/c/4399f59a9467a324e… | |
| https://git.kernel.org/stable/c/a04302867094bdc6e… | |
| https://git.kernel.org/stable/c/3382a1ed7f778db84… | |
| https://lists.debian.org/debian-lts-announce/2025… | |
| https://cert-portal.siemens.com/productcert/html/… |
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
080e6c9a3908de193a48f646c5ce1bfb15676ffc , < 0e65f38bd1aa14ea86e221b7bb814d38278d86c3
(git)
Affected: af3122f5fdc0d00581d6e598a668df6bf54c9daa , < 85eef1748c024da1a191aed56b30a3a65958c50c (git) Affected: a1e40ac5b5e9077fe1f7ae0eb88034db0f9ae1ab , < 4399f59a9467a324ed46657555f0e1f209a14acb (git) Affected: a1e40ac5b5e9077fe1f7ae0eb88034db0f9ae1ab , < a04302867094bdc6efac1b598370fc47cf3f2388 (git) Affected: a1e40ac5b5e9077fe1f7ae0eb88034db0f9ae1ab , < 3382a1ed7f778db841063f5d7e317ac55f9e7f72 (git) Affected: 33e28acf42ee863f332a958bfc2f1a284a3659df (git) Affected: 3cd00d2e3655fad3bda96dc1ebf17b6495f86fea (git) Affected: 6.1.113 , < 6.1.142 (semver) Affected: 6.6.55 , < 6.6.94 (semver) Affected: 6.10.14 , < 6.11 (semver) Affected: 6.11.3 , < 6.12 (semver) |
|
| Linux | Linux |
Affected:
6.12
Unaffected: 0 , < 6.12 (semver) Unaffected: 6.1.142 , ≤ 6.1.* (semver) Unaffected: 6.6.94 , ≤ 6.6.* (semver) Unaffected: 6.12.34 , ≤ 6.12.* (semver) Unaffected: 6.15.3 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix) |
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix udp gso skb_segment after pull from frag_list\n\nCommit a1e40ac5b5e9 (\"net: gso: fix udp gso fraglist segmentation after\npull from frag_list\") detected invalid geometry in frag_list skbs and\nredirects them from skb_segment_list to more robust skb_segment. But some\npackets with modified geometry can also hit bugs in that code. We don\u0027t\nknow how many such cases exist. Addressing each one by one also requires\ntouching the complex skb_segment code, which risks introducing bugs for\nother types of skbs. Instead, linearize all these packets that fail the\nbasic invariants on gso fraglist skbs. That is more robust.\n\nIf only part of the fraglist payload is pulled into head_skb, it will\nalways cause exception when splitting skbs by skb_segment. For detailed\ncall stack information, see below.\n\nValid SKB_GSO_FRAGLIST skbs\n- consist of two or more segments\n- the head_skb holds the protocol headers plus first gso_size\n- one or more frag_list skbs hold exactly one segment\n- all but the last must be gso_size\n\nOptional datapath hooks such as NAT and BPF (bpf_skb_pull_data) can\nmodify fraglist skbs, breaking these invariants.\n\nIn extreme cases they pull one part of data into skb linear. For UDP,\nthis causes three payloads with lengths of (11,11,10) bytes were\npulled tail to become (12,10,10) bytes.\n\nThe skbs no longer meets the above SKB_GSO_FRAGLIST conditions because\npayload was pulled into head_skb, it needs to be linearized before pass\nto regular skb_segment.\n\n skb_segment+0xcd0/0xd14\n __udp_gso_segment+0x334/0x5f4\n udp4_ufo_fragment+0x118/0x15c\n inet_gso_segment+0x164/0x338\n skb_mac_gso_segment+0xc4/0x13c\n __skb_gso_segment+0xc4/0x124\n validate_xmit_skb+0x9c/0x2c0\n validate_xmit_skb_list+0x4c/0x80\n sch_direct_xmit+0x70/0x404\n __dev_queue_xmit+0x64c/0xe5c\n neigh_resolve_output+0x178/0x1c4\n ip_finish_output2+0x37c/0x47c\n __ip_finish_output+0x194/0x240\n ip_finish_output+0x20/0xf4\n ip_output+0x100/0x1a0\n NF_HOOK+0xc4/0x16c\n ip_forward+0x314/0x32c\n ip_rcv+0x90/0x118\n __netif_receive_skb+0x74/0x124\n process_backlog+0xe8/0x1a4\n __napi_poll+0x5c/0x1f8\n net_rx_action+0x154/0x314\n handle_softirqs+0x154/0x4b8\n\n [118.376811] [C201134] rxq0_pus: [name:bug\u0026]kernel BUG at net/core/skbuff.c:4278!\n [118.376829] [C201134] rxq0_pus: [name:traps\u0026]Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP\n [118.470774] [C201134] rxq0_pus: [name:mrdump\u0026]Kernel Offset: 0x178cc00000 from 0xffffffc008000000\n [118.470810] [C201134] rxq0_pus: [name:mrdump\u0026]PHYS_OFFSET: 0x40000000\n [118.470827] [C201134] rxq0_pus: [name:mrdump\u0026]pstate: 60400005 (nZCv daif +PAN -UAO)\n [118.470848] [C201134] rxq0_pus: [name:mrdump\u0026]pc : [0xffffffd79598aefc] skb_segment+0xcd0/0xd14\n [118.470900] [C201134] rxq0_pus: [name:mrdump\u0026]lr : [0xffffffd79598a5e8] skb_segment+0x3bc/0xd14\n [118.470928] [C201134] rxq0_pus: [name:mrdump\u0026]sp : ffffffc008013770"
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"value": "AV:N - The vulnerable skb geometry is created entirely from attacker-supplied UDP packets aggregated by GRO on the ingress device, and the crash occurs when that skb is re-segmented on the forwarding/transmit path \u2014 no local access is involved. Any remote host that can get UDP datagrams routed through an affected gateway, router, or Android hotspot reaches the code.\nAC:L - The attacker fully controls the only variable that matters \u2014 the UDP payload sizes that determine the fraglist geometry \u2014 and can simply send a burst of small same-flow datagrams, trivially brute-forcing size combinations; the commit states such packets \"will always cause exception\" in skb_segment. The remaining preconditions (rx-gro-list plus an in-path NAT/XLAT-BPF hook) are properties of the target\u0027s vulnerable configuration, which is a shipping default on MediaTek/Android tethering and embedded router deployments where this was found in production.\nPR:N - There is no authentication, socket, or credential involved anywhere on the path \u2014 GRO aggregation, ip_forward, and validate_xmit_skb all run in softirq on packets from an arbitrary unauthenticated peer. The attacker merely needs their UDP traffic to transit the box.\nUI:N - Exploitation is purely a matter of sending UDP datagrams through the forwarding device; no local user or administrator has to open, mount, or interact with anything.\nS:U - The BUG()/panic occurs in the kernel that is processing the packets, and the impact is confined to that same security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:N - The failure is a defensive BUG_ON/skb_over_panic assertion in skb_segment that fires before any out-of-bounds copy, slab-page refcount manipulation, or frag descriptor is acted on, so no memory contents are read or exposed. Segments emitted prior to the panic contain only bytes from the attacker\u0027s own packet.\nI:N - The assertions abort segmentation before the malformed geometry can produce an out-of-bounds write, an incorrectly built skb, or a corrupted page reference, so no kernel memory or system data is modified. There is no write primitive an attacker can steer.\nA:H - Hitting the BUG_ON in skb_segment from NAPI/softirq context produces an Oops/kernel panic (\"kernel BUG at net/core/skbuff.c\") that takes down the entire forwarding device, and it can be re-triggered at will by simply resending the traffic. This is a complete, remotely repeatable denial of service on routers, gateways, and tethering devices."
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CVE-2025-38250 (GCVE-0-2025-38250)
Vulnerability from cvelistv5 – Published: 2025-07-09 10:42 – Updated: 2026-10-15 21:52| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/dd4becd3fd4102696… | |
| https://git.kernel.org/stable/c/90dee0a0ff84fac8a… | |
| https://git.kernel.org/stable/c/c56b177efce8b6279… | |
| https://git.kernel.org/stable/c/bc0819a25e04cd68e… | |
| https://git.kernel.org/stable/c/ce23b73f0f27e2dbe… | |
| https://git.kernel.org/stable/c/0e5c144c557df910a… | |
| https://git.kernel.org/stable/c/1d6123102e9fbedc8… | |
| https://cert-portal.siemens.com/productcert/html/… |
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
bf18c7118cf83ad4b9aa476354b4a06bcb9d0c4f , < dd4becd3fd4102696e1c15e6d260a1712a2d8685
(git)
Affected: bf18c7118cf83ad4b9aa476354b4a06bcb9d0c4f , < 90dee0a0ff84fac8accd5be98412b3819f667149 (git) Affected: bf18c7118cf83ad4b9aa476354b4a06bcb9d0c4f , < c56b177efce8b62798e4d96bdb9867106cb7c4a0 (git) Affected: bf18c7118cf83ad4b9aa476354b4a06bcb9d0c4f , < bc0819a25e04cd68ef3568cfa51b63118fea39a7 (git) Affected: bf18c7118cf83ad4b9aa476354b4a06bcb9d0c4f , < ce23b73f0f27e2dbeb81734a79db710f05aa33c6 (git) Affected: bf18c7118cf83ad4b9aa476354b4a06bcb9d0c4f , < 0e5c144c557df910ab64d9c25d06399a9a735e65 (git) Affected: bf18c7118cf83ad4b9aa476354b4a06bcb9d0c4f , < 1d6123102e9fbedc8d25bf4731da6d513173e49e (git) |
|
| Linux | Linux |
Affected:
3.4
Unaffected: 0 , < 3.4 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.97 , ≤ 6.6.* (semver) Unaffected: 6.12.36 , ≤ 6.12.* (semver) Unaffected: 6.15.5 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix) |
|
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem |
Affected:
0 , < *
(custom)
|
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_core: Fix use-after-free in vhci_flush()\n\nsyzbot reported use-after-free in vhci_flush() without repro. [0]\n\nFrom the splat, a thread close()d a vhci file descriptor while\nits device was being used by iotcl() on another thread.\n\nOnce the last fd refcnt is released, vhci_release() calls\nhci_unregister_dev(), hci_free_dev(), and kfree() for struct\nvhci_data, which is set to hci_dev-\u003edev-\u003edriver_data.\n\nThe problem is that there is no synchronisation after unlinking\nhdev from hci_dev_list in hci_unregister_dev(). There might be\nanother thread still accessing the hdev which was fetched before\nthe unlink operation.\n\nWe can use SRCU for such synchronisation.\n\nLet\u0027s run hci_dev_reset() under SRCU and wait for its completion\nin hci_unregister_dev().\n\nAnother option would be to restore hci_dev-\u003edestruct(), which was\nremoved in commit 587ae086f6e4 (\"Bluetooth: Remove unused\nhci-destruct cb\"). However, this would not be a good solution, as\nwe should not run hci_unregister_dev() while there are in-flight\nioctl() requests, which could lead to another data-race KCSAN splat.\n\nNote that other drivers seem to have the same problem, for exmaple,\nvirtbt_remove().\n\n[0]:\nBUG: KASAN: slab-use-after-free in skb_queue_empty_lockless include/linux/skbuff.h:1891 [inline]\nBUG: KASAN: slab-use-after-free in skb_queue_purge_reason+0x99/0x360 net/core/skbuff.c:3937\nRead of size 8 at addr ffff88807cb8d858 by task syz.1.219/6718\n\nCPU: 1 UID: 0 PID: 6718 Comm: syz.1.219 Not tainted 6.16.0-rc1-syzkaller-00196-g08207f42d3ff #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:408 [inline]\n print_report+0xd2/0x2b0 mm/kasan/report.c:521\n kasan_report+0x118/0x150 mm/kasan/report.c:634\n skb_queue_empty_lockless include/linux/skbuff.h:1891 [inline]\n skb_queue_purge_reason+0x99/0x360 net/core/skbuff.c:3937\n skb_queue_purge include/linux/skbuff.h:3368 [inline]\n vhci_flush+0x44/0x50 drivers/bluetooth/hci_vhci.c:69\n hci_dev_do_reset net/bluetooth/hci_core.c:552 [inline]\n hci_dev_reset+0x420/0x5c0 net/bluetooth/hci_core.c:592\n sock_do_ioctl+0xd9/0x300 net/socket.c:1190\n sock_ioctl+0x576/0x790 net/socket.c:1311\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:907 [inline]\n __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7fcf5b98e929\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fcf5c7b9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 00007fcf5bbb6160 RCX: 00007fcf5b98e929\nRDX: 0000000000000000 RSI: 00000000400448cb RDI: 0000000000000009\nRBP: 00007fcf5ba10b39 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 0000000000000000 R14: 00007fcf5bbb6160 R15: 00007ffd6353d528\n \u003c/TASK\u003e\n\nAllocated by task 6535:\n kasan_save_stack mm/kasan/common.c:47 [inline]\n kasan_save_track+0x3e/0x80 mm/kasan/common.c:68\n poison_kmalloc_redzone mm/kasan/common.c:377 [inline]\n __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394\n kasan_kmalloc include/linux/kasan.h:260 [inline]\n __kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4359\n kmalloc_noprof include/linux/slab.h:905 [inline]\n kzalloc_noprof include/linux/slab.h:1039 [inline]\n vhci_open+0x57/0x360 drivers/bluetooth/hci_vhci.c:635\n misc_open+0x2bc/0x330 drivers/char/misc.c:161\n chrdev_open+0x4c9/0x5e0 fs/char_dev.c:414\n do_dentry_open+0xdf0/0x1970 fs/open.c:964\n vfs_open+0x3b/0x340 fs/open.c:1094\n do_open fs/namei.c:3887 [inline]\n path_openat+0x2ee5/0x3830 fs/name\n---truncated---"
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"value": "AV:L - Although this is the Bluetooth subsystem, the vulnerable path is not reachable from over-the-air traffic \u2014 it requires a local `ioctl(HCIDEVRESET)` on an AF_BLUETOOTH HCI socket raced against a local `close()` of the transport fd (or driver removal). Both sides of the race are local syscalls.\nAC:L - The attacker controls both racing threads (close of the vhci fd vs. the HCIDEVRESET ioctl) and the window is large, spanning the full `hci_dev_close_sync()`/`hci_dev_open_sync()` command-sync sequence inside `hci_dev_do_reset()`. Failed attempts are harmless and can be repeated indefinitely until the race is won.\nPR:L - `HCIDEVRESET` is gated on `capable(CAP_NET_ADMIN)`, a capability held by non-root service accounts such as bluetoothd and Android\u0027s Bluetooth process rather than requiring full init-namespace root, and this repo consistently scores CAP_NET_ADMIN-gated Bluetooth mgmt/ioctl bugs as PR:L. The free side additionally needs no privilege at all when supplied by ordinary transport-driver teardown (btusb/hci_ldisc/virtio_bt unregister).\nUI:N - The attacker drives both the reset ioctl and the device teardown from its own threads with no victim participation. No user action of any kind is needed.\nS:U - The use-after-free corrupts kernel heap memory and yields kernel-privilege compromise within the same security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a slab use-after-free on a `kmalloc-1k` object; `skb_queue_purge_reason()` reads the freed `sk_buff_head` and dereferences pointers taken from it, so an attacker who reclaims the slot obtains an arbitrary kernel-memory read primitive and full disclosure of kernel memory.\nI:H - The UAF is read *and* write: `skb_queue_splice_init()` writes back into the freed object and `kfree_skb()` is invoked on attacker-reclaimable pointers, while `vhci_send_frame()` performs `skb_queue_tail()` into freed memory. That combination gives a controlled-free and linked-list-write primitive suitable for control-flow hijacking and privilege escalation.\nA:H - Even without successful heap grooming, purging a freed skb queue and freeing garbage pointers reliably corrupts the slab allocator and panics the kernel. The attacker can trigger it repeatedly for a persistent denial of service."
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CVE-2025-38380 (GCVE-0-2025-38380)
Vulnerability from cvelistv5 – Published: 2025-07-25 12:53 – Updated: 2025-09-17 13:51This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
Show details on NVD website{
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CVE-2025-38471 (GCVE-0-2025-38471)
Vulnerability from cvelistv5 – Published: 2025-07-28 11:21 – Updated: 2026-10-15 01:07| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/730fed2ff5e259495… | |
| https://git.kernel.org/stable/c/1f3a429c21e0e43e8… | |
| https://git.kernel.org/stable/c/cdb767915fc9a15d8… | |
| https://git.kernel.org/stable/c/c76f6f437c46b2390… | |
| https://git.kernel.org/stable/c/4ab26bce3969f8fd9… | |
| https://lists.debian.org/debian-lts-announce/2025… | |
| https://cert-portal.siemens.com/productcert/html/… |
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < 730fed2ff5e259495712518e18d9f521f61972bb
(git)
Affected: 0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < 1f3a429c21e0e43e8b8c55d30701e91411a4df02 (git) Affected: 0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < cdb767915fc9a15d88d19d52a1455f1dc3e5ddc8 (git) Affected: 0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < c76f6f437c46b2390888e0e1dc7aafafa9f4e0c6 (git) Affected: 0d87bbd39d7fd1135ab9eca672d760470f6508e8 , < 4ab26bce3969f8fd925fe6f6f551e4d1a508c68b (git) Affected: 2277d7cbdf47531b2c3cd01ba15255fa955aab35 (git) Affected: 6.0.6 , < 6.1 (semver) |
|
| Linux | Linux |
Affected:
6.1
Unaffected: 0 , < 6.1 (semver) Unaffected: 6.1.147 , ≤ 6.1.* (semver) Unaffected: 6.6.100 , ≤ 6.6.* (semver) Unaffected: 6.12.40 , ≤ 6.12.* (semver) Unaffected: 6.15.8 , ≤ 6.15.* (semver) Unaffected: 6.16 , ≤ * (original_commit_for_fix) |
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.100",
"versionStartIncluding": "6.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.40",
"versionStartIncluding": "6.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.15.8",
"versionStartIncluding": "6.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.16",
"versionStartIncluding": "6.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.0.6",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: always refresh the queue when reading sock\n\nAfter recent changes in net-next TCP compacts skbs much more\naggressively. This unearthed a bug in TLS where we may try\nto operate on an old skb when checking if all skbs in the\nqueue have matching decrypt state and geometry.\n\n BUG: KASAN: slab-use-after-free in tls_strp_check_rcv+0x898/0x9a0 [tls]\n (net/tls/tls_strp.c:436 net/tls/tls_strp.c:530 net/tls/tls_strp.c:544)\n Read of size 4 at addr ffff888013085750 by task tls/13529\n\n CPU: 2 UID: 0 PID: 13529 Comm: tls Not tainted 6.16.0-rc5-virtme\n Call Trace:\n kasan_report+0xca/0x100\n tls_strp_check_rcv+0x898/0x9a0 [tls]\n tls_rx_rec_wait+0x2c9/0x8d0 [tls]\n tls_sw_recvmsg+0x40f/0x1aa0 [tls]\n inet_recvmsg+0x1c3/0x1f0\n\nAlways reload the queue, fast path is to have the record in the queue\nwhen we wake, anyway (IOW the path going down \"if !strp-\u003estm.full_len\")."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The vulnerable code is the kTLS receive strparser, driven directly from the TCP `sk_data_ready` softirq hook and from `recvmsg()` on data supplied by the remote TLS peer. A remote attacker triggers it purely by choosing TLS record framing and TCP segment sizes/timing on an ordinary connection to a kTLS-enabled service.\nAC:L - The attacker controls every side of the condition \u2014 the record header that sets `stm.full_len`, the many small/large segments that push `sk_rmem_alloc` past `sk_rcvbuf` to force `tcp_collapse()` to free the anchored skb, and the final segment that makes `inq \u003e= full_len` \u2014 and can retry indefinitely across parallel connections. It was hit by the plain in-tree `tls` selftest, not an exotic race.\nPR:N - The attacker is the remote peer of a TLS connection and needs no account or privilege on the target; kTLS servers (nginx/HAProxy with kTLS offload, TLS-terminating proxies) accept connections from anonymous clients and enable `TLS_RX` right after the handshake.\nUI:N - The victim application merely receives data on an already-established kTLS socket; the strparser runs from softirq on packet arrival with no local user action required.\nS:U - The corruption is confined to kernel skb/slab memory of the affected host, with no crossing of a VM, IOMMU, or sandbox security authority.\nC:H - This is a slab use-after-free read: freed skb metadata is read, and the attacker-influenced `skb-\u003enext` chain lets the loop walk into reallocated memory, giving an arbitrary-address read oracle via the true/false result; freed pages are further fed into the AEAD scatterlist by `skb_to_sgvec()`.\nI:H - Use-after-free with heap grooming yields write primitives \u2014 `tls_strp_msg_hold()` performs `skb_clone()` on the freed skbs, writing refcounts into reallocated objects, and the stale `frag_list` drives crypto operations over freed memory, which is exploitable for control-flow hijacking.\nA:H - KASAN confirms a slab-use-after-free, and the unbounded `skb = skb-\u003enext` walk over freed memory readily faults on a wild pointer, producing a kernel oops/panic that a remote attacker can trigger repeatedly."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:02:10.110Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/730fed2ff5e259495712518e18d9f521f61972bb"
},
{
"url": "https://git.kernel.org/stable/c/1f3a429c21e0e43e8b8c55d30701e91411a4df02"
},
{
"url": "https://git.kernel.org/stable/c/cdb767915fc9a15d88d19d52a1455f1dc3e5ddc8"
},
{
"url": "https://git.kernel.org/stable/c/c76f6f437c46b2390888e0e1dc7aafafa9f4e0c6"
},
{
"url": "https://git.kernel.org/stable/c/4ab26bce3969f8fd925fe6f6f551e4d1a508c68b"
}
],
"title": "tls: always refresh the queue when reading sock",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-38471",
"datePublished": "2025-07-28T11:21:32.927Z",
"dateReserved": "2025-04-16T04:51:24.021Z",
"dateUpdated": "2026-10-15T01:07:24.522Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date | Other |
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Nomenclature
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