{ "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" } } ] } }