{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64380", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.784Z", "datePublished": "2026-07-25T08:50:30.476Z", "dateUpdated": "2026-07-25T08:50:30.476Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:50:30.476Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: harden POSIX SID length parsing\n\nposix_info_sid_size() reads sid[1] to obtain the subauthority count,\nbut its existing boundary check still accepts buffers with only one\nremaining byte. Require two bytes before reading sid[1] so all client\npaths that reuse the helper reject truncated POSIX SIDs safely."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2pdu.c"], "versions": [{"version": "349e13ad30b45998bb9937cfe0b32be6f951976d", "lessThan": "171605aed68380c2fa75dff9b3a1ed427c50065b", "status": "affected", "versionType": "git"}, {"version": "349e13ad30b45998bb9937cfe0b32be6f951976d", "lessThan": "4213c1208978483021d7d125c131de3985d38f61", "status": "affected", "versionType": "git"}, {"version": "349e13ad30b45998bb9937cfe0b32be6f951976d", "lessThan": "96e889bc1e759c83f25093e8c2f3da31b4973f30", "status": "affected", "versionType": "git"}, {"version": "349e13ad30b45998bb9937cfe0b32be6f951976d", "lessThan": "0de5b8e76847f5de26f364a82c6602c4881c30da", "status": "affected", "versionType": "git"}, {"version": "349e13ad30b45998bb9937cfe0b32be6f951976d", "lessThan": "427eb7eb46425fec845a43e861f3d6e2899cae59", "status": "affected", "versionType": "git"}, {"version": "349e13ad30b45998bb9937cfe0b32be6f951976d", "lessThan": "86c5d470f5d42e61123b2f4b4f0b91f4eee5b980", "status": "affected", "versionType": "git"}, {"version": "349e13ad30b45998bb9937cfe0b32be6f951976d", "lessThan": "46a84715a015cb48e1b9c219dc88c03d8a541ea4", "status": "affected", "versionType": "git"}, {"version": "349e13ad30b45998bb9937cfe0b32be6f951976d", "lessThan": "7ad2bcf2441430bb2e918fb3ef9a90d775a6e422", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2pdu.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.2-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/171605aed68380c2fa75dff9b3a1ed427c50065b"}, {"url": "https://git.kernel.org/stable/c/4213c1208978483021d7d125c131de3985d38f61"}, {"url": "https://git.kernel.org/stable/c/96e889bc1e759c83f25093e8c2f3da31b4973f30"}, {"url": "https://git.kernel.org/stable/c/0de5b8e76847f5de26f364a82c6602c4881c30da"}, {"url": "https://git.kernel.org/stable/c/427eb7eb46425fec845a43e861f3d6e2899cae59"}, {"url": "https://git.kernel.org/stable/c/86c5d470f5d42e61123b2f4b4f0b91f4eee5b980"}, {"url": "https://git.kernel.org/stable/c/46a84715a015cb48e1b9c219dc88c03d8a541ea4"}, {"url": "https://git.kernel.org/stable/c/7ad2bcf2441430bb2e918fb3ef9a90d775a6e422"}], "title": "smb: client: harden POSIX SID length parsing", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[349e13ad30b45998bb9937cfe0b32be6f951976d,171605aed68380c2fa75dff9b3a1ed427c50065b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[349e13ad30b45998bb9937cfe0b32be6f951976d,4213c1208978483021d7d125c131de3985d38f61)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[349e13ad30b45998bb9937cfe0b32be6f951976d,96e889bc1e759c83f25093e8c2f3da31b4973f30)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[349e13ad30b45998bb9937cfe0b32be6f951976d,0de5b8e76847f5de26f364a82c6602c4881c30da)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[349e13ad30b45998bb9937cfe0b32be6f951976d,427eb7eb46425fec845a43e861f3d6e2899cae59)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[349e13ad30b45998bb9937cfe0b32be6f951976d,86c5d470f5d42e61123b2f4b4f0b91f4eee5b980)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[349e13ad30b45998bb9937cfe0b32be6f951976d,46a84715a015cb48e1b9c219dc88c03d8a541ea4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[349e13ad30b45998bb9937cfe0b32be6f951976d,7ad2bcf2441430bb2e918fb3ef9a90d775a6e422)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-25T16:00:05.060119+00:00", "updated": "2026-07-25T16:00:05.060160+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}