{ "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" } } } }