{"id":"CVE-2024-49965","state":"PUBLISHED","title":"ocfs2: remove unreasonable unlock in ocfs2_read_blocks","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: remove unreasonable unlock in ocfs2_read_blocks\n\nPatch series \"Misc fixes for ocfs2_read_blocks\", v5.\n\nThis series contains 2 fixes for ocfs2_read_blocks().  The first patch fix\nthe issue reported by syzbot, which detects bad unlock balance in\nocfs2_read_blocks().  The second patch fixes an issue reported by Heming\nZhao when reviewing above fix.\n\n\nThis patch (of 2):\n\nThere was a lock release before exiting, so remove the unreasonable unlock.","publishedAt":"2024-10-21T18:02:16.407Z","updatedAt":"2026-08-05T11:40:44.001Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc","status":"affected","lessThan":"5245f109b4afb6595360d4c180d483a6d2009a59","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"9753bcb17b36c9add9b32c61766ddf8d2d161911","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"3f1ca6ba5452d53c598a45d21267a2c0c221eef3","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"f55a33fe0fb5274ef185fd61947cf142138958af","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"81aba693b129e82e11bb54f569504d943d018de9","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"84543da867c967edffd5065fa910ebf56aaae49d","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"df4f20fc3673cee11abf2c571987a95733cb638d","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"39a88623af3f1c686bf6db1e677ed865ffe6fccc","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"c03a82b4a0c935774afa01fd6d128b444fd930a1","versionType":"git"},{"version":"01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56","status":"affected","versionType":"git"},{"version":"65cbd1279f4b999d56a838344a30642db24cd215","status":"affected","versionType":"git"},{"version":"97e1db17bc1ef4c2e1789bc9323c7be44fba53f8","status":"affected","versionType":"git"},{"version":"4.19.87","status":"affected","lessThan":"4.19.323","versionType":"semver"},{"version":"4.4.204","status":"affected","lessThan":"4.5","versionType":"semver"},{"version":"4.9.204","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.157","status":"affected","lessThan":"4.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/buffer_head_io.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"4.19.323","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.285","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.227","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.168","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.113","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.55","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.14","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11.3","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/buffer_head_io.c"]}],"references":["https://git.kernel.org/stable/c/5245f109b4afb6595360d4c180d483a6d2009a59","https://git.kernel.org/stable/c/9753bcb17b36c9add9b32c61766ddf8d2d161911","https://git.kernel.org/stable/c/3f1ca6ba5452d53c598a45d21267a2c0c221eef3","https://git.kernel.org/stable/c/f55a33fe0fb5274ef185fd61947cf142138958af","https://git.kernel.org/stable/c/81aba693b129e82e11bb54f569504d943d018de9","https://git.kernel.org/stable/c/84543da867c967edffd5065fa910ebf56aaae49d","https://git.kernel.org/stable/c/df4f20fc3673cee11abf2c571987a95733cb638d","https://git.kernel.org/stable/c/39a88623af3f1c686bf6db1e677ed865ffe6fccc","https://git.kernel.org/stable/c/c03a82b4a0c935774afa01fd6d128b444fd930a1","https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:56.516Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/49xxx/CVE-2024-49965.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-49965","state":"PUBLISHED","datePublished":"2024-10-21T18:02:16.407Z","dateUpdated":"2026-08-05T11:40:44.001Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-10-21T12:17:06.050Z"},"containers":{"cna":{"title":"ocfs2: remove unreasonable unlock in ocfs2_read_blocks","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: remove unreasonable unlock in ocfs2_read_blocks\n\nPatch series \"Misc fixes for ocfs2_read_blocks\", v5.\n\nThis series contains 2 fixes for ocfs2_read_blocks().  The first patch fix\nthe issue reported by syzbot, which detects bad unlock balance in\nocfs2_read_blocks().  The second patch fixes an issue reported by Heming\nZhao when reviewing above fix.\n\n\nThis patch (of 2):\n\nThere was a lock release before exiting, so remove the unreasonable unlock."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc","status":"affected","lessThan":"5245f109b4afb6595360d4c180d483a6d2009a59","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"9753bcb17b36c9add9b32c61766ddf8d2d161911","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"3f1ca6ba5452d53c598a45d21267a2c0c221eef3","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"f55a33fe0fb5274ef185fd61947cf142138958af","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"81aba693b129e82e11bb54f569504d943d018de9","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"84543da867c967edffd5065fa910ebf56aaae49d","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"df4f20fc3673cee11abf2c571987a95733cb638d","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"39a88623af3f1c686bf6db1e677ed865ffe6fccc","versionType":"git"},{"version":"cf76c78595ca87548ca5e45c862ac9e0949c4687","status":"affected","lessThan":"c03a82b4a0c935774afa01fd6d128b444fd930a1","versionType":"git"},{"version":"01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56","status":"affected","versionType":"git"},{"version":"65cbd1279f4b999d56a838344a30642db24cd215","status":"affected","versionType":"git"},{"version":"97e1db17bc1ef4c2e1789bc9323c7be44fba53f8","status":"affected","versionType":"git"},{"version":"4.19.87","status":"affected","lessThan":"4.19.323","versionType":"semver"},{"version":"4.4.204","status":"affected","lessThan":"4.5","versionType":"semver"},{"version":"4.9.204","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.157","status":"affected","lessThan":"4.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/buffer_head_io.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"4.19.323","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.285","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.227","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.168","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.113","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.55","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.14","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11.3","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/buffer_head_io.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/5245f109b4afb6595360d4c180d483a6d2009a59"},{"url":"https://git.kernel.org/stable/c/9753bcb17b36c9add9b32c61766ddf8d2d161911"},{"url":"https://git.kernel.org/stable/c/3f1ca6ba5452d53c598a45d21267a2c0c221eef3"},{"url":"https://git.kernel.org/stable/c/f55a33fe0fb5274ef185fd61947cf142138958af"},{"url":"https://git.kernel.org/stable/c/81aba693b129e82e11bb54f569504d943d018de9"},{"url":"https://git.kernel.org/stable/c/84543da867c967edffd5065fa910ebf56aaae49d"},{"url":"https://git.kernel.org/stable/c/df4f20fc3673cee11abf2c571987a95733cb638d"},{"url":"https://git.kernel.org/stable/c/39a88623af3f1c686bf6db1e677ed865ffe6fccc"},{"url":"https://git.kernel.org/stable/c/c03a82b4a0c935774afa01fd6d128b444fd930a1"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable path is reached only through local syscalls against a mounted ocfs2 volume (stat/open/readdir/getxattr/read reaching ocfs2_read_inode_block, dx-leaf, xattr-bucket and extent-map reads) or by mounting a crafted ocfs2 image; no network protocol handler processes attacker data here.\nAC:L - sb_getblk() failure is deterministic for an out-of-range block number supplied by on-disk metadata (grow_buffers() rejects it outright), and is also inducible via memory pressure; the follow-on mutual-exclusion failure has a wait_on_buffer()-wide window with the attacker driving both racing threads.\nPR:L - Any unprivileged local user with access to a mounted ocfs2 filesystem can issue the metadata reads that reach ocfs2_read_blocks() and drive the allocation failure; no capability, and ocfs2 metadata reads are not gated behind CAP_SYS_ADMIN.\nUI:N - On an already-mounted ocfs2 volume (the normal cluster deployment) the attacker triggers the double unlock purely with its own syscalls; no victim action is needed.\nS:U - The corrupted mutex, the ocfs2 metadata cache and the buffer heads all live in the same kernel security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - Losing mutual exclusion lets a second thread run ocfs2_expand_cache() against the already-converted union, copying live rb_node kernel heap pointers into c_block values that surface through mlog/tracepoints, and the resulting metadata-cache corruption is leverageable for further kernel memory disclosure.\nI:H - The spurious unlock releases a mutex held by another task, allowing unserialized rb-tree insertion, ci_num_cached/ci_flags corruption and orphaned kmem_cache objects in a region whose invariants are explicitly unchecked, i.e. attacker-influenced corruption of kernel heap state and of the clustered-uptodate metadata the filesystem trusts.\nA:H - The imbalance produces an immediate lockdep/DEBUG_MUTEXES \"bad unlock balance\" splat (panic under panic_on_warn) and, in production builds, reaches BUG() via mlog_bug_on_msg() in ocfs2_expand_cache(), the duplicate-insert BUG() in __ocfs2_insert_cache_tree(), or the ip_io_mutex assertion in ocfs2_clear_inode() — all kernel panics."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T11:40:44.001Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.87","versionEndExcluding":"4.19.323"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.285"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.10.227"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.15.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.1.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.6.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.10.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.11.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.204"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9.204"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.157"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-49965","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-10-22T13:34:35.371630Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-10-22T13:38:47.085Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T22:23:47.003Z"}}]}}}