CVE-2025-40231 (GCVE-0-2025-40231)
Vulnerability from cvelistv5 – Published: 2025-12-04 15:31 – Updated: 2026-05-23 16:01
VLAI
EPSS
VEX
Title
vsock: fix lock inversion in vsock_assign_transport()
Summary
In the Linux kernel, the following vulnerability has been resolved:
vsock: fix lock inversion in vsock_assign_transport()
Syzbot reported a potential lock inversion deadlock between
vsock_register_mutex and sk_lock-AF_VSOCK when vsock_linger() is called.
The issue was introduced by commit 687aa0c5581b ("vsock: Fix
transport_* TOCTOU") which added vsock_register_mutex locking in
vsock_assign_transport() around the transport->release() call, that can
call vsock_linger(). vsock_assign_transport() can be called with sk_lock
held. vsock_linger() calls sk_wait_event() that temporarily releases and
re-acquires sk_lock. During this window, if another thread hold
vsock_register_mutex while trying to acquire sk_lock, a circular
dependency is created.
Fix this by releasing vsock_register_mutex before calling
transport->release() and vsock_deassign_transport(). This is safe
because we don't need to hold vsock_register_mutex while releasing the
old transport, and we ensure the new transport won't disappear by
obtaining a module reference first via try_module_get().
Severity
No CVSS data available.
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8667e8d0eb46bc54fdae30ba2f4786407d3d88eb , < ce4f856c64f0bc30e29302a0ce41f4295ca391c5
(git)
Affected: 36a439049b34cca0b3661276049b84a1f76cc21a , < 09bba278ccde25a14b6e5088a9e65a8717d0cccf (git) Affected: 9ce53e744f18e73059d3124070e960f3aa9902bf , < b44182c116778feaa05da52a426aeb9da1878dcf (git) Affected: 9d24bb6780282b0255b9929abe5e8f98007e2c6e , < 42ed0784d11adebf748711e503af0eb9f1e6d81d (git) Affected: ae2c712ba39c7007de63cb0c75b51ce1caaf1da5 , < 251caee792a21eb0b781aab91362b422c945e162 (git) Affected: 687aa0c5581b8d4aa87fd92973e4ee576b550cdf , < a2a4346eea8b4cb75037dbcb20b98cb454324f80 (git) Affected: 687aa0c5581b8d4aa87fd92973e4ee576b550cdf , < f7c877e7535260cc7a21484c994e8ce7e8cb6780 (git) Affected: 7b73bddf54777fb62d4d8c7729d0affe6df04477 (git) Affected: 5.10.240 , < 5.10.246 (semver) Affected: 5.15.189 , < 5.15.196 (semver) Affected: 6.1.146 , < 6.1.158 (semver) Affected: 6.6.99 , < 6.6.115 (semver) Affected: 6.12.39 , < 6.12.56 (semver) Affected: 6.15.7 , < 6.16 (semver) |
guessed | |
| Linux | Linux |
Affected:
6.16
Unaffected: 0 , < 6.16 (semver) Unaffected: 5.10.246 , ≤ 5.10.* (semver) Unaffected: 5.15.196 , ≤ 5.15.* (semver) Unaffected: 6.1.158 , ≤ 6.1.* (semver) Unaffected: 6.6.115 , ≤ 6.6.* (semver) Unaffected: 6.12.56 , ≤ 6.12.* (semver) Unaffected: 6.17.6 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix) |
guessed |
{
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},
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"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"version": "6.16"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"version": "5.10.246",
"versionType": "semver"
},
{
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"version": "5.15.196",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.1.158",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.115",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.56",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: fix lock inversion in vsock_assign_transport()\n\nSyzbot reported a potential lock inversion deadlock between\nvsock_register_mutex and sk_lock-AF_VSOCK when vsock_linger() is called.\n\nThe issue was introduced by commit 687aa0c5581b (\"vsock: Fix\ntransport_* TOCTOU\") which added vsock_register_mutex locking in\nvsock_assign_transport() around the transport-\u003erelease() call, that can\ncall vsock_linger(). vsock_assign_transport() can be called with sk_lock\nheld. vsock_linger() calls sk_wait_event() that temporarily releases and\nre-acquires sk_lock. During this window, if another thread hold\nvsock_register_mutex while trying to acquire sk_lock, a circular\ndependency is created.\n\nFix this by releasing vsock_register_mutex before calling\ntransport-\u003erelease() and vsock_deassign_transport(). This is safe\nbecause we don\u0027t need to hold vsock_register_mutex while releasing the\nold transport, and we ensure the new transport won\u0027t disappear by\nobtaining a module reference first via try_module_get()."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-23T16:01:44.908Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ce4f856c64f0bc30e29302a0ce41f4295ca391c5"
},
{
"url": "https://git.kernel.org/stable/c/09bba278ccde25a14b6e5088a9e65a8717d0cccf"
},
{
"url": "https://git.kernel.org/stable/c/b44182c116778feaa05da52a426aeb9da1878dcf"
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{
"url": "https://git.kernel.org/stable/c/42ed0784d11adebf748711e503af0eb9f1e6d81d"
},
{
"url": "https://git.kernel.org/stable/c/251caee792a21eb0b781aab91362b422c945e162"
},
{
"url": "https://git.kernel.org/stable/c/a2a4346eea8b4cb75037dbcb20b98cb454324f80"
},
{
"url": "https://git.kernel.org/stable/c/f7c877e7535260cc7a21484c994e8ce7e8cb6780"
}
],
"title": "vsock: fix lock inversion in vsock_assign_transport()",
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"cveId": "CVE-2025-40231",
"datePublished": "2025-12-04T15:31:22.199Z",
"dateReserved": "2025-04-16T07:20:57.180Z",
"dateUpdated": "2026-05-23T16:01:44.908Z",
"state": "PUBLISHED"
},
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"date": "2026-09-17",
"epss": "0.00207",
"percentile": "0.11032"
},
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During this window, if another thread hold\\nvsock_register_mutex while trying to acquire sk_lock, a circular\\ndependency is created.\\n\\nFix this by releasing vsock_register_mutex before calling\\ntransport-\u003erelease() and vsock_deassign_transport(). This is safe\\nbecause we don\u0027t need to hold vsock_register_mutex while releasing the\\nold transport, and we ensure the new transport won\u0027t disappear by\\nobtaining a module reference first via try_module_get().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/vmw_vsock/af_vsock.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8667e8d0eb46bc54fdae30ba2f4786407d3d88eb\",\"lessThan\":\"ce4f856c64f0bc30e29302a0ce41f4295ca391c5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"36a439049b34cca0b3661276049b84a1f76cc21a\",\"lessThan\":\"09bba278ccde25a14b6e5088a9e65a8717d0cccf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9ce53e744f18e73059d3124070e960f3aa9902bf\",\"lessThan\":\"b44182c116778feaa05da52a426aeb9da1878dcf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9d24bb6780282b0255b9929abe5e8f98007e2c6e\",\"lessThan\":\"42ed0784d11adebf748711e503af0eb9f1e6d81d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ae2c712ba39c7007de63cb0c75b51ce1caaf1da5\",\"lessThan\":\"251caee792a21eb0b781aab91362b422c945e162\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"687aa0c5581b8d4aa87fd92973e4ee576b550cdf\",\"lessThan\":\"a2a4346eea8b4cb75037dbcb20b98cb454324f80\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"687aa0c5581b8d4aa87fd92973e4ee576b550cdf\",\"lessThan\":\"f7c877e7535260cc7a21484c994e8ce7e8cb6780\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7b73bddf54777fb62d4d8c7729d0affe6df04477\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.240\",\"lessThan\":\"5.10.246\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.189\",\"lessThan\":\"5.15.196\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.146\",\"lessThan\":\"6.1.158\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.99\",\"lessThan\":\"6.6.115\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.39\",\"lessThan\":\"6.12.56\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.15.7\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/vmw_vsock/af_vsock.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.246\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.196\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.158\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.115\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.56\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.6\",\"lessThanOrEqual\":\"6.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/09bba278ccde25a14b6e5088a9e65a8717d0cccf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/251caee792a21eb0b781aab91362b422c945e162\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/42ed0784d11adebf748711e503af0eb9f1e6d81d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a2a4346eea8b4cb75037dbcb20b98cb454324f80\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b44182c116778feaa05da52a426aeb9da1878dcf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ce4f856c64f0bc30e29302a0ce41f4295ca391c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f7c877e7535260cc7a21484c994e8ce7e8cb6780\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-30T10:20:06+00:00",
"cve": "CVE-2025-40231",
"id": "CVE-2025-40231",
"initial_release_date": "2025-12-04T00:00:00+00:00",
"product_status:known_affected": "232",
"product_status:known_not_affected": "42",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: vsock: fix lock inversion in vsock_assign_transport()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40231.json",
"version": "3"
}
}
}
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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