{"dataType":"CVE_RECORD","dataVersion":"5.1","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":"2025-05-04T09:16:20.926Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T09:16:20.926Z"},"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"}}]}}