CVE-2024-57982 (GCVE-0-2024-57982)
Vulnerability from cvelistv5 – Published: 2025-02-27 02:07 – Updated: 2026-10-30 12:20
VLAI
EPSS
VEX
Title
xfrm: state: fix out-of-bounds read during lookup
Summary
In the Linux kernel, the following vulnerability has been resolved:
xfrm: state: fix out-of-bounds read during lookup
lookup and resize can run in parallel.
The xfrm_state_hash_generation seqlock ensures a retry, but the hash
functions can observe a hmask value that is too large for the new hlist
array.
rehash does:
rcu_assign_pointer(net->xfrm.state_bydst, ndst) [..]
net->xfrm.state_hmask = nhashmask;
While state lookup does:
h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {
This is only safe in case the update to state_bydst is larger than
net->xfrm.xfrm_state_hmask (or if the lookup function gets
serialized via state spinlock again).
Fix this by prefetching state_hmask and the associated pointers.
The xfrm_state_hash_generation seqlock retry will ensure that the pointer
and the hmask will be consistent.
The existing helpers, like xfrm_dst_hash(), are now unsafe for RCU side,
add lockdep assertions to document that they are only safe for insert
side.
xfrm_state_lookup_byaddr() uses the spinlock rather than RCU.
AFAICS this is an oversight from back when state lookup was converted to
RCU, this lock should be replaced with RCU in a future patch.
Severity
7.8 (High)
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:31 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
c2f672fc94642bae96821a393f342edcfa9794a6 , < 80610185e9dd2ef7c0a4818a47390a8655b3dc27
(git)
Affected: c2f672fc94642bae96821a393f342edcfa9794a6 , < b86dc510308d7a8955f3f47a4fea4bef887653e4 (git) Affected: c2f672fc94642bae96821a393f342edcfa9794a6 , < a16871c7832ea6435abb6e0b58289ae7dcb7e4fc (git) Affected: c2f672fc94642bae96821a393f342edcfa9794a6 , < dd4c2a174994238d55ab54da2545543d36f4e0d0 (git) Affected: c2f672fc94642bae96821a393f342edcfa9794a6 , < e952837f3ddb0ff726d5b582aa1aad9aa38d024d (git) |
guessed | |
| Linux | Linux |
Affected:
4.9
Unaffected: 0 , < 4.9 (semver) Unaffected: 6.1.191 , ≤ 6.1.* (semver) Unaffected: 6.6.120 , ≤ 6.6.* (semver) Unaffected: 6.12.13 , ≤ 6.12.* (semver) Unaffected: 6.13.2 , ≤ 6.13.* (semver) Unaffected: 6.14 , ≤ * (original_commit_for_fix) |
guessed |
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"url": "https://git.kernel.org/stable/c/a16871c7832ea6435abb6e0b58289ae7dcb7e4fc"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b86dc510308d7a8955f3f47a4fea4bef887653e4"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/dd4c2a174994238d55ab54da2545543d36f4e0d0"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Mailing List",
"Patch"
],
"url": "https://git.kernel.org/stable/c/e952837f3ddb0ff726d5b582aa1aad9aa38d024d"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-125"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-125"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-10-30T00:58:58+00:00",
"cve": "CVE-2024-57982",
"id": "CVE-2024-57982",
"initial_release_date": "2024-01-01T00:00:00+00:00",
"product_status:fixed": "612",
"product_status:known_affected": "84",
"product_status:known_not_affected": "28",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: xfrm: state: fix out-of-bounds read during lookup",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-57982.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2024-57982",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-01T19:31:46.705139Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125 Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-01T16:54:28.525Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/xfrm/xfrm_state.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "80610185e9dd2ef7c0a4818a47390a8655b3dc27",
"status": "affected",
"version": "c2f672fc94642bae96821a393f342edcfa9794a6",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
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{
"lessThan": "a16871c7832ea6435abb6e0b58289ae7dcb7e4fc",
"status": "affected",
"version": "c2f672fc94642bae96821a393f342edcfa9794a6",
"versionType": "git"
},
{
"lessThan": "dd4c2a174994238d55ab54da2545543d36f4e0d0",
"status": "affected",
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{
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"status": "affected",
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"versionType": "git"
}
]
},
{
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"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.9"
},
{
"lessThan": "4.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.191",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.120",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.13",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.13.*",
"status": "unaffected",
"version": "6.13.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.191",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.120",
"versionStartIncluding": "4.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.13",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.13.2",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: state: fix out-of-bounds read during lookup\n\nlookup and resize can run in parallel.\n\nThe xfrm_state_hash_generation seqlock ensures a retry, but the hash\nfunctions can observe a hmask value that is too large for the new hlist\narray.\n\nrehash does:\n rcu_assign_pointer(net-\u003exfrm.state_bydst, ndst) [..]\n net-\u003exfrm.state_hmask = nhashmask;\n\nWhile state lookup does:\n h = xfrm_dst_hash(net, daddr, saddr, tmpl-\u003ereqid, encap_family);\n hlist_for_each_entry_rcu(x, net-\u003exfrm.state_bydst + h, bydst) {\n\nThis is only safe in case the update to state_bydst is larger than\nnet-\u003exfrm.xfrm_state_hmask (or if the lookup function gets\nserialized via state spinlock again).\n\nFix this by prefetching state_hmask and the associated pointers.\nThe xfrm_state_hash_generation seqlock retry will ensure that the pointer\nand the hmask will be consistent.\n\nThe existing helpers, like xfrm_dst_hash(), are now unsafe for RCU side,\nadd lockdep assertions to document that they are only safe for insert\nside.\n\nxfrm_state_lookup_byaddr() uses the spinlock rather than RCU.\nAFAICS this is an oversight from back when state lookup was converted to\nRCU, this lock should be replaced with RCU in a future patch."
}
],
"metrics": [
{
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"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"
},
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{
"lang": "en",
"value": "AV:L - The race is reliably driven locally: XFRM netlink (`XFRM_MSG_NEWSA` to force `xfrm_hash_resize()`, `XFRM_MSG_GETSA` to drive concurrent lookups) is reachable from an unprivileged user\u0027s own network namespace, where the xfrm state hash tables are per-netns. Although the lookup is also hit by unauthenticated remote ESP/AH packets via `xfrm_input_state_lookup()`, a remote attacker cannot schedule the racing resize, so the local vector is the exploitable one.\nAC:L - The attacker controls both sides of the race \u2014 inserting SAs to schedule `xfrm_hash_resize()` on one CPU while issuing lookups with attacker-chosen spi/daddr on another \u2014 and can repeat indefinitely by creating fresh network namespaces, each yielding a new sequence of doubling resizes. syzbot reproduced this from ordinary syscalls.\nPR:L - `xfrm_user_rcv_msg()` requires `netlink_net_capable(CAP_NET_ADMIN)`, which resolves to `ns_capable(net-\u003euser_ns, CAP_NET_ADMIN)` and is therefore satisfied by any unprivileged user after `unshare -Urn`. No real root in the initial namespace is needed.\nUI:N - The attacker triggers both the hash resize and the concurrent state lookup entirely from their own threads; no victim action or cooperation is involved.\nS:U - The out-of-bounds access and any resulting corruption stay within the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The stale-table/new-mask mismatch reads up to a full table length past the allocation, and the OOB slot is dereferenced as an `hlist_node` and `container_of()`\u0027d into a `struct xfrm_state`, so adjacent slab contents the attacker can groom become a fake-object pointer, yielding reads at attacker-influenced kernel addresses rather than a bounded few-byte leak.\nI:H - The bogus state pointer reaches `refcount_inc_not_zero(\u0026x-\u003erefcnt)`, an increment write at an attacker-influenced address, and a fabricated `xfrm_state` returned to `xfrm_input()`/`xfrm_state_find()` is then used for IPsec processing \u2014 both usable to corrupt kernel state and pursue control-flow hijack.\nA:H - Walking a garbage hlist pointer read past the end of the hash table dereferences a wild address, producing an oops or panic; with larger page-order tables the OOB read can also fault into unmapped memory."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T12:20:34.191Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
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},
{
"url": "https://git.kernel.org/stable/c/b86dc510308d7a8955f3f47a4fea4bef887653e4"
},
{
"url": "https://git.kernel.org/stable/c/a16871c7832ea6435abb6e0b58289ae7dcb7e4fc"
},
{
"url": "https://git.kernel.org/stable/c/dd4c2a174994238d55ab54da2545543d36f4e0d0"
},
{
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}
],
"title": "xfrm: state: fix out-of-bounds read during lookup",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-57982",
"datePublished": "2025-02-27T02:07:08.169Z",
"dateReserved": "2025-02-27T02:04:28.913Z",
"dateUpdated": "2026-10-30T12:20:34.191Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.