{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-39463", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-25T14:23:23.744Z", "datePublished": "2024-06-25T14:25:02.887Z", "dateUpdated": "2026-05-11T20:21:01.570Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:21:01.570Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\n9p: add missing locking around taking dentry fid list\n\nFix a use-after-free on dentry's d_fsdata fid list when a thread\nlooks up a fid through dentry while another thread unlinks it:\n\nUAF thread:\nrefcount_t: addition on 0; use-after-free.\n p9_fid_get linux/./include/net/9p/client.h:262\n v9fs_fid_find+0x236/0x280 linux/fs/9p/fid.c:129\n v9fs_fid_lookup_with_uid linux/fs/9p/fid.c:181\n v9fs_fid_lookup+0xbf/0xc20 linux/fs/9p/fid.c:314\n v9fs_vfs_getattr_dotl+0xf9/0x360 linux/fs/9p/vfs_inode_dotl.c:400\n vfs_statx+0xdd/0x4d0 linux/fs/stat.c:248\n\nFreed by:\n p9_fid_destroy (inlined)\n p9_client_clunk+0xb0/0xe0 linux/net/9p/client.c:1456\n p9_fid_put linux/./include/net/9p/client.h:278\n v9fs_dentry_release+0xb5/0x140 linux/fs/9p/vfs_dentry.c:55\n v9fs_remove+0x38f/0x620 linux/fs/9p/vfs_inode.c:518\n vfs_unlink+0x29a/0x810 linux/fs/namei.c:4335\n\nThe problem is that d_fsdata was not accessed under d_lock, because\nd_release() normally is only called once the dentry is otherwise no\nlonger accessible but since we also call it explicitly in v9fs_remove\nthat lock is required:\nmove the hlist out of the dentry under lock then unref its fids once\nthey are no longer accessible." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/9p/vfs_dentry.c" ], "versions": [ { "version": "154372e67d4053e56591245eb413686621941333", "lessThan": "3bb6763a8319170c2d41c4232c8e7e4c37dcacfb", "status": "affected", "versionType": "git" }, { "version": "154372e67d4053e56591245eb413686621941333", "lessThan": "cb299cdba09f46f090b843d78ba26b667d50a456", "status": "affected", "versionType": "git" }, { "version": "154372e67d4053e56591245eb413686621941333", "lessThan": "f0c5c944c6d8614c19e6e9a97fd2011dcd30e8f5", "status": "affected", "versionType": "git" }, { "version": "154372e67d4053e56591245eb413686621941333", "lessThan": "fe17ebf22feb4ad7094d597526d558a49aac92b4", "status": "affected", "versionType": "git" }, { "version": "154372e67d4053e56591245eb413686621941333", "lessThan": "c898afdc15645efb555acb6d85b484eb40a45409", "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/9p/vfs_dentry.c" ], "versions": [ { "version": "5.11", "status": "affected" }, { "version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.168", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.94", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.34", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.5", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "5.11", "versionEndExcluding": "5.15.168" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.1.94" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.6.34" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.9.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3bb6763a8319170c2d41c4232c8e7e4c37dcacfb" }, { "url": "https://git.kernel.org/stable/c/cb299cdba09f46f090b843d78ba26b667d50a456" }, { "url": "https://git.kernel.org/stable/c/f0c5c944c6d8614c19e6e9a97fd2011dcd30e8f5" }, { "url": "https://git.kernel.org/stable/c/fe17ebf22feb4ad7094d597526d558a49aac92b4" }, { "url": "https://git.kernel.org/stable/c/c898afdc15645efb555acb6d85b484eb40a45409" }, { "url": "https://www.zerodayinitiative.com/advisories/ZDI-24-1194/" } ], "title": "9p: add missing locking around taking dentry fid list", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:26:15.245Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/cb299cdba09f46f090b843d78ba26b667d50a456", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/f0c5c944c6d8614c19e6e9a97fd2011dcd30e8f5", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/fe17ebf22feb4ad7094d597526d558a49aac92b4", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/c898afdc15645efb555acb6d85b484eb40a45409", "tags": [ "x_transferred" ] } ] }, { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-416", "lang": "en", "description": "CWE-416 Use After Free" } ] } ], "affected": [ { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:5.11:*:*:*:*:*:*:*" ], "defaultStatus": "affected", "versions": [ { "version": "5.11", "status": "affected" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*" ], "defaultStatus": "unaffected", "versions": [ { "version": "154372e67d40", "status": "affected", "lessThan": "cb299cdba09f", "versionType": "custom" }, { "version": "154372e67d40", "status": "affected", "lessThan": "f0c5c944c6d8", "versionType": "custom" }, { "version": "154372e67d40", "status": "affected", "lessThan": "fe17ebf22feb", "versionType": "custom" }, { "version": "154372e67d40", "status": "affected", "lessThan": "c898afdc1564", "versionType": "custom" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-10T03:55:21.281977Z", "id": "CVE-2024-39463", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-10T15:36:18.860Z" } } ] } }