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vuln-cve/data/2022/49xxx/CVE-2022-49425.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2022-49425",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-02-26T02:08:31.569Z",
"datePublished": "2025-02-26T02:12:46.702Z",
"dateUpdated": "2026-08-05T08:55:10.701Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T08:55:10.701Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix dereference of stale list iterator after loop body\n\nThe list iterator variable will be a bogus pointer if no break was hit.\nDereferencing it (cur->page in this case) could load an out-of-bounds/undefined\nvalue making it unsafe to use that in the comparision to determine if the\nspecific element was found.\n\nSince 'cur->page' *can* be out-ouf-bounds it cannot be guaranteed that\nby chance (or intention of an attacker) it matches the value of 'page'\neven though the correct element was not found.\n\nThis is fixed by using a separate list iterator variable for the loop\nand only setting the original variable if a suitable element was found.\nThen determing if the element was found is simply checking if the\nvariable is set."
}
],
"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 - Reachable only via local f2fs atomic-write ioctls and pagecache invalidate/truncate on an f2fs inode (F2FS_IOC_START_ATOMIC_WRITE → dirty → f2fs_invalidate_folio → f2fs_drop_inmem_page); not via network protocol handlers.\nAC:L - An unprivileged local attacker fully controls the atomic-write, write, and truncate/invalidate sequence on their own file and can drive the drop path directly; no attacker-independent timing or rare hardware state is required.\nPR:L - F2FS_IOC_START_ATOMIC_WRITE only needs inode_owner_or_capable, so any unprivileged user who owns a file on a mounted f2fs volume (common on Android userdata) can enter the path without real root.\nUI:N - On typical f2fs deployments the filesystem is already mounted; the attacker triggers the bug with their own ioctl/write/truncate and needs no separate victim action.\nS:U - Impact is kernel memory corruption within the host f2fs/pagecache authority and does not cross VM, IOMMU, or other security boundaries.\nC:H - On the not-found path the stale iterator aliases into f2fs_inode_info; continuing to kmem_cache_free that address corrupts slab freelists, which is leveragable for arbitrary kernel read primitives.\nI:H - list_del on the bogus inmem_pages object and kmem_cache_free of a non-slab inode-interior pointer yield heap corruption exploitable for arbitrary write and control-flow hijacking.\nA:H - The same path can BUG_ON/WARN then fault in list_del/slab free, or panic from corrupted freelists, so availability impact is a kernel oops/panic."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/f2fs/segment.c"
],
"versions": [
{
"version": "8c242db9b8c01b252290e23827163787f07e01d1",
"lessThan": "385edd3ce5b4b1e9d31f474a5e35a39779ec1110",
"status": "affected",
"versionType": "git"
},
{
"version": "8c242db9b8c01b252290e23827163787f07e01d1",
"lessThan": "5e47a7add3dda7f236548c5ec3017776dc2a729f",
"status": "affected",
"versionType": "git"
},
{
"version": "8c242db9b8c01b252290e23827163787f07e01d1",
"lessThan": "51d584704d18e60fa473823654f35611c777b291",
"status": "affected",
"versionType": "git"
},
{
"version": "8c242db9b8c01b252290e23827163787f07e01d1",
"lessThan": "45b2b7d7108ae1e25a5036cab04ab9273e792332",
"status": "affected",
"versionType": "git"
},
{
"version": "8c242db9b8c01b252290e23827163787f07e01d1",
"lessThan": "b26e1c777890e4b938136deb8ec07a29f33862e4",
"status": "affected",
"versionType": "git"
},
{
"version": "8c242db9b8c01b252290e23827163787f07e01d1",
"lessThan": "ed7efc472c00986dcd6903ab6ed165c7fa167674",
"status": "affected",
"versionType": "git"
},
{
"version": "8c242db9b8c01b252290e23827163787f07e01d1",
"lessThan": "2aaf51dd39afb6d01d13f1e6fe20b684733b37d5",
"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/f2fs/segment.c"
],
"versions": [
{
"version": "4.12",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.12",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.247",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.198",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.121",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.46",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.17.14",
"lessThanOrEqual": "5.17.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.18.3",
"lessThanOrEqual": "5.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.19",
"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": "4.12",
"versionEndExcluding": "4.19.247"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.12",
"versionEndExcluding": "5.4.198"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.12",
"versionEndExcluding": "5.10.121"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.12",
"versionEndExcluding": "5.15.46"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.12",
"versionEndExcluding": "5.17.14"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.12",
"versionEndExcluding": "5.18.3"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.12",
"versionEndExcluding": "5.19"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/385edd3ce5b4b1e9d31f474a5e35a39779ec1110"
},
{
"url": "https://git.kernel.org/stable/c/5e47a7add3dda7f236548c5ec3017776dc2a729f"
},
{
"url": "https://git.kernel.org/stable/c/51d584704d18e60fa473823654f35611c777b291"
},
{
"url": "https://git.kernel.org/stable/c/45b2b7d7108ae1e25a5036cab04ab9273e792332"
},
{
"url": "https://git.kernel.org/stable/c/b26e1c777890e4b938136deb8ec07a29f33862e4"
},
{
"url": "https://git.kernel.org/stable/c/ed7efc472c00986dcd6903ab6ed165c7fa167674"
},
{
"url": "https://git.kernel.org/stable/c/2aaf51dd39afb6d01d13f1e6fe20b684733b37d5"
}
],
"title": "f2fs: fix dereference of stale list iterator after loop body",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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