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vuln-cve/data/2025/71xxx/CVE-2025-71292.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-71292",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-05-06T11:31:45.509Z",
"datePublished": "2026-05-06T11:32:23.897Z",
"dateUpdated": "2026-08-05T12:12:42.348Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:12:42.348Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: nlink overflow in jfs_rename\n\nIf nlink is maximal for a directory (-1) and inside that directory you\nperform a rename for some child directory (not moving from the parent),\nthen the nlink of the first directory is first incremented and later\ndecremented. Normally this is fine, but when nlink = -1 this causes a\nwrap around to 0, and then drop_nlink issues a warning.\n\nAfter applying the patch syzbot no longer issues any warnings. I also\nran some basic fs tests to look for any regressions."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - An NFSv3/v4 RENAME on an exported JFS directory follows SunRPC dispatch through nfsd_rename and vfs_rename into jfs_rename. Thus a remote NFS client can reach the vulnerable code.\nAC:L - With the parent nlink at 0xffffffff, one same-parent directory rename deterministically triggers the wrap and warning. No race is required, and the filesystem state can be attacker-controlled.\nPR:N - A writable NFS export permitting anonymous or AUTH_NULL access requires no account or prior privileges. nfsd's export and directory permission checks still permit the operation when the anonymous identity has write access.\nUI:N - The attacker directly submits the RENAME operation after the affected filesystem state exists. No separate victim action is required in an already mounted and exported JFS deployment.\nS:U - The warning and resulting denial of service affect the same kernel and host processing the filesystem operation. No virtualization, IOMMU, or other security boundary is crossed.\nC:N - The overflow affects only the unsigned link-count field and does not read or disclose memory. The count is restored before the successful transaction commits.\nI:N - There is no out-of-bounds access, use-after-free, or arbitrary write primitive. On the successful path the transient zero link count is restored to 0xffffffff before metadata is dirtied or committed.\nA:H - The repeatable WARN_ON can panic the kernel when panic_on_warn or an applicable warn_limit is configured. Even without those settings, repeated remote renames can continuously generate expensive warning traces."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/jfs/namei.c"
],
"versions": [
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "2108829a59f081e822fdab8c2cd7131deb8aa8a1",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "b4330a0d0947fbdc9d445cbbeabd8cc910a8c9ca",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "a3d66089e50a6e0142f8884471f74292102ea9aa",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "f70fcbc2ac7c24f087a2c895c5753aa730b1e479",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "5d77c36cd4b698649f5c30c5f6c084f4f61d1880",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "fe136426e30ca6debcf916fd6a141555ed9fde74",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "93c325746ae59709b4f9bad4e3e4761c8d566c70",
"status": "affected",
"versionType": "git"
},
{
"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"lessThan": "9218dc26fd922b09858ecd3666ed57dfd8098da8",
"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/jfs/namei.c"
],
"versions": [
{
"version": "2.6.12",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.12",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.252",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.202",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.165",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.128",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.75",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.16",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.19.6",
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.0",
"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": "2.6.12",
"versionEndExcluding": "5.10.252"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "5.15.202"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.1.165"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.6.128"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.12.75"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.18.16"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "6.19.6"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.12",
"versionEndExcluding": "7.0"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/2108829a59f081e822fdab8c2cd7131deb8aa8a1"
},
{
"url": "https://git.kernel.org/stable/c/b4330a0d0947fbdc9d445cbbeabd8cc910a8c9ca"
},
{
"url": "https://git.kernel.org/stable/c/a3d66089e50a6e0142f8884471f74292102ea9aa"
},
{
"url": "https://git.kernel.org/stable/c/f70fcbc2ac7c24f087a2c895c5753aa730b1e479"
},
{
"url": "https://git.kernel.org/stable/c/5d77c36cd4b698649f5c30c5f6c084f4f61d1880"
},
{
"url": "https://git.kernel.org/stable/c/fe136426e30ca6debcf916fd6a141555ed9fde74"
},
{
"url": "https://git.kernel.org/stable/c/93c325746ae59709b4f9bad4e3e4761c8d566c70"
},
{
"url": "https://git.kernel.org/stable/c/9218dc26fd922b09858ecd3666ed57dfd8098da8"
}
],
"title": "jfs: nlink overflow in jfs_rename",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
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