{"cve":"CVE-2026-89614","nvd":{"published":"2026-09-11T20:19:46.543","modified":"2026-10-19T09:17:58.040","status":"Received","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":[],"references":["https://git.kernel.org/stable/c/19cac7902a8ab748e15f98ddaafcf5f8882be21d","https://git.kernel.org/stable/c/dc15a9f5307d5372aef3b64bf3ed7802f530c471"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-89614","score":0.00553,"percentile":0.45927,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}