{"api_version":"1","generated_at":"2026-09-11T21:24:32+00:00","cve":"CVE-2026-89614","urls":{"html":"https://cve.report/CVE-2026-89614","api":"https://cve.report/api/cve/CVE-2026-89614.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89614","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89614"},"summary":{"title":"ntfs: bound the free-cluster bitmap scan to the volume","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: bound the free-cluster bitmap scan to the volume\n\nvol->lcn_empty_bits_per_page is sized from vol->nr_clusters at mount, but\nntfs_cluster_alloc() bounds its scan of that array by the size of $Bitmap.\nThose are independent on-disk quantities and the mount-time check only\nrejects a $Bitmap that is too small, so an image whose $Bitmap covers more\nclusters than the volume has lets the scan index past the array.  A run\nwhose LCN lies in that gap takes the allocator straight there, since the\ncaller passes the file's own last LCN as its locality hint.  KASAN reports\na slab out-of-bounds read when a file on such a volume is extended.\n\nClamp the scan to what that array covers, mirroring the max_index\ncalculation the mount-time scan already uses, and reject a decoded LCN\nat or beyond nr_clusters in the mapping pairs decoder.  Conforming\nvolumes are unaffected.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:46","updated_at":"2026-09-11 20:19:46"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/dc15a9f5307d5372aef3b64bf3ed7802f530c471","name":"https://git.kernel.org/stable/c/dc15a9f5307d5372aef3b64bf3ed7802f530c471","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/19cac7902a8ab748e15f98ddaafcf5f8882be21d","name":"https://git.kernel.org/stable/c/19cac7902a8ab748e15f98ddaafcf5f8882be21d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89614","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89614","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 11ccc9107dc460de28af90fac1f42404d9802735 dc15a9f5307d5372aef3b64bf3ed7802f530c471 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 11ccc9107dc460de28af90fac1f42404d9802735 19cac7902a8ab748e15f98ddaafcf5f8882be21d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.1","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ntfs/lcnalloc.c","fs/ntfs/runlist.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"dc15a9f5307d5372aef3b64bf3ed7802f530c471","status":"affected","version":"11ccc9107dc460de28af90fac1f42404d9802735","versionType":"git"},{"lessThan":"19cac7902a8ab748e15f98ddaafcf5f8882be21d","status":"affected","version":"11ccc9107dc460de28af90fac1f42404d9802735","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ntfs/lcnalloc.c","fs/ntfs/runlist.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.1"},{"lessThan":"7.1","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"7.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"7.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: bound the free-cluster bitmap scan to the volume\n\nvol->lcn_empty_bits_per_page is sized from vol->nr_clusters at mount, but\nntfs_cluster_alloc() bounds its scan of that array by the size of $Bitmap.\nThose are independent on-disk quantities and the mount-time check only\nrejects a $Bitmap that is too small, so an image whose $Bitmap covers more\nclusters than the volume has lets the scan index past the array.  A run\nwhose LCN lies in that gap takes the allocator straight there, since the\ncaller passes the file's own last LCN as its locality hint.  KASAN reports\na slab out-of-bounds read when a file on such a volume is extended.\n\nClamp the scan to what that array covers, mirroring the max_index\ncalculation the mount-time scan already uses, and reject a decoded LCN\nat or beyond nr_clusters in the mapping pairs decoder.  Conforming\nvolumes are unaffected."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:45:14.747Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/dc15a9f5307d5372aef3b64bf3ed7802f530c471"},{"url":"https://git.kernel.org/stable/c/19cac7902a8ab748e15f98ddaafcf5f8882be21d"}],"title":"ntfs: bound the free-cluster bitmap scan to the volume","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89614","datePublished":"2026-09-11T19:45:14.747Z","dateReserved":"2026-09-11T19:38:34.735Z","dateUpdated":"2026-09-11T19:45:14.747Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:46","lastModifiedDate":"2026-09-11 20:19:46","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89614","Ordinal":"1","Title":"ntfs: bound the free-cluster bitmap scan to the volume","CVE":"CVE-2026-89614","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89614","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: bound the free-cluster bitmap scan to the volume\n\nvol->lcn_empty_bits_per_page is sized from vol->nr_clusters at mount, but\nntfs_cluster_alloc() bounds its scan of that array by the size of $Bitmap.\nThose are independent on-disk quantities and the mount-time check only\nrejects a $Bitmap that is too small, so an image whose $Bitmap covers more\nclusters than the volume has lets the scan index past the array.  A run\nwhose LCN lies in that gap takes the allocator straight there, since the\ncaller passes the file's own last LCN as its locality hint.  KASAN reports\na slab out-of-bounds read when a file on such a volume is extended.\n\nClamp the scan to what that array covers, mirroring the max_index\ncalculation the mount-time scan already uses, and reject a decoded LCN\nat or beyond nr_clusters in the mapping pairs decoder.  Conforming\nvolumes are unaffected.","Type":"Description","Title":"ntfs: bound the free-cluster bitmap scan to the volume"}]}}}