CVE-2024-49965

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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."}], "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() \u2014 all kernel panics."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ocfs2/buffer_head_io.c"], "versions": [{"version": "6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc", "lessThan": "5245f109b4afb6595360d4c180d483a6d2009a59", "status": "affected", "versionType": "git"}, {"version": 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"lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "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": "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", 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"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"}], "x_generator": {"engine": "bippy-1.2.0"}, "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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.323", "versionStartIncluding": "4.19.87"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.285", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.227", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.168", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.113", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.55", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.10.14", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.11.3", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.4.204"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.9.204"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.14.157"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:54:10.835Z"}}}, "cveMetadata": {"cveId": "CVE-2024-49965", "state": "PUBLISHED", "dateUpdated": "2026-05-23T15:54:10.835Z", "dateReserved": "2024-10-21T12:17:06.050Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-10-21T18:02:16.407Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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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."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ocfs2: eliminar el desbloqueo irrazonable en ocfs2_read_blocks Serie de parches \"Correcciones varias para ocfs2_read_blocks\", v5. Esta serie contiene 2 correcciones para ocfs2_read_blocks(). El primer parche corrige el problema informado por syzbot, que detecta un balance de desbloqueo incorrecto en ocfs2_read_blocks(). El segundo parche corrige un problema informado por Heming Zhao al revisar la correcci\u00f3n anterior. Este parche (de 2): Hubo una liberaci\u00f3n de bloqueo antes de salir, as\u00ed que elimine el desbloqueo irrazonable."}], "id": "CVE-2024-49965", "lastModified": "2026-08-04T11:21:02.847", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-49965", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-22T13:34:35.371630Z", "version": "2.0.3"}}]}, "published": "2024-10-21T18:15:17.593", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/39a88623af3f1c686bf6db1e677ed865ffe6fccc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3f1ca6ba5452d53c598a45d21267a2c0c221eef3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5245f109b4afb6595360d4c180d483a6d2009a59"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/81aba693b129e82e11bb54f569504d943d018de9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/84543da867c967edffd5065fa910ebf56aaae49d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9753bcb17b36c9add9b32c61766ddf8d2d161911"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c03a82b4a0c935774afa01fd6d128b444fd930a1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df4f20fc3673cee11abf2c571987a95733cb638d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f55a33fe0fb5274ef185fd61947cf142138958af"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ocfs2: remove unreasonable unlock in ocfs2_read_blocks", "id": "2320473", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320473"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-667", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nocfs2: remove unreasonable unlock in ocfs2_read_blocks\nPatch series \"Misc fixes for ocfs2_read_blocks\", v5.\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.\nThis patch (of 2):\nThere was a lock release before exiting, so remove the unreasonable unlock."], "name": "CVE-2024-49965", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-49965\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-49965\nhttps://lore.kernel.org/linux-cve-announce/2024102132-CVE-2024-49965-9ed0@gregkh/T"], "threat_severity": "Moderate"}

{}