{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31716", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.133Z", "datePublished": "2026-05-01T13:56:11.263Z", "dateUpdated": "2026-05-01T13:56:11.263Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-01T13:56:11.263Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate rec->used in journal-replay file record check\n\ncheck_file_record() validates rec->total against the record size but\nnever validates rec->used. The do_action() journal-replay handlers read\nrec->used from disk and use it to compute memmove lengths:\n\n DeleteAttribute: memmove(attr, ..., used - asize - roff)\n CreateAttribute: memmove(..., attr, used - roff)\n change_attr_size: memmove(..., used - PtrOffset(rec, next))\n\nWhen rec->used is smaller than the offset of a validated attribute, or\nlarger than the record size, these subtractions can underflow allowing\nus to copy huge amounts of memory in to a 4kb buffer, generally\nconsidered a bad idea overall.\n\nThis requires a corrupted filesystem, which isn't a threat model the\nkernel really needs to worry about, but checking for such an obvious\nout-of-bounds value is good to keep things robust, especially on journal\nreplay\n\nFix this up by bounding rec->used correctly.\n\nThis is much like commit b2bc7c44ed17 (\"fs/ntfs3: Fix slab-out-of-bounds\nread in DeleteIndexEntryRoot\") which checked different values in this\nsame switch statement."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs3/fslog.c"], "versions": [{"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "f90b8a1798b750755a9e9aee66678f0a1820bbaf", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "4b1613d7e2deda831a97e427d1ea586e50fe1be5", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "0112e6279420d4005b3d57af36fb45c01b8d0116", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "f79d0403ea20a81bc29105bba54fbcab54e8c403", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "0ca0485e4b2e837ebb6cbd4f2451aba665a03e4b", "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/ntfs3/fslog.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.136", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.84", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.25", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.2", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc1", "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": "5.15", "versionEndExcluding": "6.6.136"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.84"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.25"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.0.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.1-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f90b8a1798b750755a9e9aee66678f0a1820bbaf"}, {"url": "https://git.kernel.org/stable/c/4b1613d7e2deda831a97e427d1ea586e50fe1be5"}, {"url": "https://git.kernel.org/stable/c/0112e6279420d4005b3d57af36fb45c01b8d0116"}, {"url": "https://git.kernel.org/stable/c/f79d0403ea20a81bc29105bba54fbcab54e8c403"}, {"url": "https://git.kernel.org/stable/c/0ca0485e4b2e837ebb6cbd4f2451aba665a03e4b"}], "title": "fs/ntfs3: validate rec->used in journal-replay file record check", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate rec->used in journal-replay file record check\n\ncheck_file_record() validates rec->total against the record size but\nnever validates rec->used. The do_action() journal-replay handlers read\nrec->used from disk and use it to compute memmove lengths:\n\n DeleteAttribute: memmove(attr, ..., used - asize - roff)\n CreateAttribute: memmove(..., attr, used - roff)\n change_attr_size: memmove(..., used - PtrOffset(rec, next))\n\nWhen rec->used is smaller than the offset of a validated attribute, or\nlarger than the record size, these subtractions can underflow allowing\nus to copy huge amounts of memory in to a 4kb buffer, generally\nconsidered a bad idea overall.\n\nThis requires a corrupted filesystem, which isn't a threat model the\nkernel really needs to worry about, but checking for such an obvious\nout-of-bounds value is good to keep things robust, especially on journal\nreplay\n\nFix this up by bounding rec->used correctly.\n\nThis is much like commit b2bc7c44ed17 (\"fs/ntfs3: Fix slab-out-of-bounds\nread in DeleteIndexEntryRoot\") which checked different values in this\nsame switch statement."}], "id": "CVE-2026-31716", "lastModified": "2026-05-01T15:24:14.893", "metrics": {}, "published": "2026-05-01T14:16:21.743", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0112e6279420d4005b3d57af36fb45c01b8d0116"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0ca0485e4b2e837ebb6cbd4f2451aba665a03e4b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b1613d7e2deda831a97e427d1ea586e50fe1be5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f79d0403ea20a81bc29105bba54fbcab54e8c403"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f90b8a1798b750755a9e9aee66678f0a1820bbaf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{}