{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-22079","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-12-29T08:45:45.815Z","datePublished":"2025-04-16T14:12:29.215Z","dateUpdated":"2026-08-05T11:56:34.590Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:56:34.590Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: validate l_tree_depth to avoid out-of-bounds access\n\nThe l_tree_depth field is 16-bit (__le16), but the actual maximum depth is\nlimited to OCFS2_MAX_PATH_DEPTH.\n\nAdd a check to prevent out-of-bounds access if l_tree_depth has an invalid\nvalue, which may occur when reading from a corrupted mounted disk [1]."}],"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 by parsing on-disk OCFS2 extent-tree metadata of a mounted volume, requiring local access to supply/attach the crafted block device or to operate on files of the corrupted filesystem. It is not reachable via any network protocol handler.\nAC:L - The attacker fully controls the on-disk `l_tree_depth` fields and the extent-block chain, so the descent depth — and therefore the number of out-of-bounds `p_node[]` slots written — is deterministic; no race or uncontrollable precondition is involved (metaecc checksums are trivially computed by the attacker, and the feature may be off entirely).\nPR:L - An unprivileged local user suffices in realistic deployments: desktop/kiosk automounters (udisks2) mount attacker-supplied removable media, and on an already-mounted volume any user with file access drives `ocfs2_find_path()` via write/truncate/punch-hole/reflink. Real root in the initial namespace is not required for the trigger itself.\nUI:N - No separate victim action is needed — an automounter mounts the attacker's device automatically, and in OCFS2's native shared-disk cluster deployment the corrupted extent block is written to shared storage and consumed by peer nodes on an already-mounted filesystem during normal file I/O.\nS:U - The out-of-bounds write corrupts kernel slab memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The overflow writes kernel `buffer_head`/`ocfs2_extent_list` pointers into adjacent kmalloc-96 slab objects, corrupting neighbouring structures in a way that is leverageable into an arbitrary-read primitive and leaks kernel pointer values into adjacent state.\nI:H - This is an unbounded out-of-bounds heap write (a cyclic extent-block chain lets the index grow without limit), overwriting adjacent slab objects with kernel pointers — a classic heap-corruption primitive exploitable for control-flow hijack and privilege escalation.\nA:H - Corrupting neighbouring slab objects with pointer values reliably produces a kernel oops/panic, and the crafted chain can also loop indefinitely while scribbling over memory, taking the machine down."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ocfs2/alloc.c"],"versions":[{"version":"ccd979bdbce9fba8412beb3f1de68a9d0171b12c","lessThan":"ef34840bda333fe99bafbd2d73b70ceaaf9eba66","status":"affected","versionType":"git"},{"version":"ccd979bdbce9fba8412beb3f1de68a9d0171b12c","lessThan":"538ed8b049ef801a86c543433e5061a91cc106e3","status":"affected","versionType":"git"},{"version":"ccd979bdbce9fba8412beb3f1de68a9d0171b12c","lessThan":"17c99ab3db2ba74096d36c69daa6e784e98fc0b8","status":"affected","versionType":"git"},{"version":"ccd979bdbce9fba8412beb3f1de68a9d0171b12c","lessThan":"11e24802e73362aa2948ee16b8fb4e32635d5b2a","status":"affected","versionType":"git"},{"version":"ccd979bdbce9fba8412beb3f1de68a9d0171b12c","lessThan":"3d012ba4404a0bb517658699ba85e6abda386dc3","status":"affected","versionType":"git"},{"version":"ccd979bdbce9fba8412beb3f1de68a9d0171b12c","lessThan":"49d2a2ea9d30991bae82107f9523915b91637683","status":"affected","versionType":"git"},{"version":"ccd979bdbce9fba8412beb3f1de68a9d0171b12c","lessThan":"b942f88fe7d2d789e51c5c30a675fa1c126f5a6d","status":"affected","versionType":"git"},{"version":"ccd979bdbce9fba8412beb3f1de68a9d0171b12c","lessThan":"e95d97c9c8cd0c239b7b59c79be0f6a9dcf7905c","status":"affected","versionType":"git"},{"version":"ccd979bdbce9fba8412beb3f1de68a9d0171b12c","lessThan":"a406aff8c05115119127c962cbbbbd202e1973ef","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/ocfs2/alloc.c"],"versions":[{"version":"2.6.16","status":"affected"},{"version":"0","lessThan":"2.6.16","status":"unaffected","versionType":"semver"},{"version":"5.4.292","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.236","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.180","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.134","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.87","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.23","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.13.11","lessThanOrEqual":"6.13.*","status":"unaffected","versionType":"semver"},{"version":"6.14.2","lessThanOrEqual":"6.14.*","status":"unaffected","versionType":"semver"},{"version":"6.15","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":"2.6.16","versionEndExcluding":"5.4.292"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.10.236"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.15.180"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.1.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.6.87"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.12.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.13.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.14.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ef34840bda333fe99bafbd2d73b70ceaaf9eba66"},{"url":"https://git.kernel.org/stable/c/538ed8b049ef801a86c543433e5061a91cc106e3"},{"url":"https://git.kernel.org/stable/c/17c99ab3db2ba74096d36c69daa6e784e98fc0b8"},{"url":"https://git.kernel.org/stable/c/11e24802e73362aa2948ee16b8fb4e32635d5b2a"},{"url":"https://git.kernel.org/stable/c/3d012ba4404a0bb517658699ba85e6abda386dc3"},{"url":"https://git.kernel.org/stable/c/49d2a2ea9d30991bae82107f9523915b91637683"},{"url":"https://git.kernel.org/stable/c/b942f88fe7d2d789e51c5c30a675fa1c126f5a6d"},{"url":"https://git.kernel.org/stable/c/e95d97c9c8cd0c239b7b59c79be0f6a9dcf7905c"},{"url":"https://git.kernel.org/stable/c/a406aff8c05115119127c962cbbbbd202e1973ef"}],"title":"ocfs2: validate l_tree_depth to avoid out-of-bounds access","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T19:41:59.218Z"}}]}}