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{"title": "xfrm: state: fix out-of-bounds read during lookup", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "c2f672fc94642bae96821a393f342edcfa9794a6", "lessThan": "b86dc510308d7a8955f3f47a4fea4bef887653e4", "versionType": "git"}, {"status": "affected", "version": "c2f672fc94642bae96821a393f342edcfa9794a6", "lessThan": "a16871c7832ea6435abb6e0b58289ae7dcb7e4fc", "versionType": "git"}, {"status": "affected", "version": "c2f672fc94642bae96821a393f342edcfa9794a6", "lessThan": "dd4c2a174994238d55ab54da2545543d36f4e0d0", "versionType": "git"}, {"status": "affected", "version": "c2f672fc94642bae96821a393f342edcfa9794a6", "lessThan": "e952837f3ddb0ff726d5b582aa1aad9aa38d024d", "versionType": "git"}], "programFiles": ["net/xfrm/xfrm_state.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": 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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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.120", "versionStartIncluding": "4.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.13", "versionStartIncluding": "4.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.13.2", "versionStartIncluding": "4.9"}, {"criteria": 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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1F3C05B7-5F93-443D-9334-0B93D74DDA67", "versionEndExcluding": "6.12.13", "versionStartIncluding": "4.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6D4116B1-1BFD-4F23-BA84-169CC05FC5A3", "versionEndExcluding": "6.13.2", "versionStartIncluding": "6.13", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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->xfrm.state_bydst, ndst) [..]\n net->xfrm.state_hmask = nhashmask;\n\nWhile state lookup does:\n h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);\n hlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {\n\nThis is only safe in case the update to state_bydst is larger than\nnet->xfrm.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."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: xfrm: state: fix out-of-limits read during lookup lookup and resize can run in parallel. El 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). Solucione esto al precargar state_hmask y los punteros asociados. El reintento de seqlock xfrm_state_hash_generation asegurar\u00e1 que el puntero y el hmask sean consistentes. Los ayudantes existentes, como xfrm_dst_hash(), ahora no son seguros para el lado de RCU, agregue afirmaciones lockdep para documentar que solo son seguros para el lado de inserci\u00f3n. xfrm_state_lookup_byaddr() usa el bloqueo giratorio en lugar de RCU. AFAICS esto es un descuido de cuando la b\u00fasqueda de estado se convirti\u00f3 a RCU, este bloqueo debe reemplazarse con RCU en un parche futuro."}], "id": "CVE-2024-57982", "lastModified": "2026-01-11T17:15:51.883", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"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"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-02-27T02:15:11.397", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "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": ["Mailing List", "Patch"], "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"}]}

{"bugzilla": {"description": "kernel: xfrm: state: fix out-of-bounds read during lookup", "id": "2348640", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348640"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nxfrm: state: fix out-of-bounds read during lookup\nlookup and resize can run in parallel.\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.\nrehash does:\nrcu_assign_pointer(net->xfrm.state_bydst, ndst) [..]\nnet->xfrm.state_hmask = nhashmask;\nWhile state lookup does:\nh = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);\nhlist_for_each_entry_rcu(x, net->xfrm.state_bydst + h, bydst) {\nThis is only safe in case the update to state_bydst is larger than\nnet->xfrm.xfrm_state_hmask (or if the lookup function gets\nserialized via state spinlock again).\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.\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.\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."], "name": "CVE-2024-57982", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-57982\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-57982\nhttps://lore.kernel.org/linux-cve-announce/2025022635-CVE-2024-57982-c76a@gregkh/T"], "threat_severity": "Moderate"}

{}