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vuln-cve/data/2025/22xxx/CVE-2025-22079.json
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{
"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"
}
}
]
}
}
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