CyberRota Analysis
AI-GeneratedThe vulnerability in the Linux kernel affects the NTFS file system, specifically in how the free-cluster bitmap is scanned during allocation. An attacker could exploit this flaw to trigger a slab out-of-bounds read, potentially leading to information disclosure or system instability when extending files on improperly configured NTFS volumes. Organizations using Linux systems with NTFS support should prioritize addressing this issue to ensure the integrity and security of their file storage.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: ntfs: bound the free-cluster bitmap scan to the volume vol->lcn_empty_bits_per_page is sized from vol->nr_clusters at mount, but ntfs_cluster_alloc() bounds its scan of that array by the size of $Bitmap. Those are independent on-disk quantities and the mount-time check only rejects a $Bitmap that is too small, so an image whose $Bitmap covers more clusters than the volume has lets the scan index past the array. A run whose LCN lies in that gap takes the allocator straight there, since the caller passes the file's own last LCN as its locality hint. KASAN reports a slab out-of-bounds read when a file on such a volume is extended. Clamp the scan to what that array covers, mirroring the max_index calculation the mount-time scan already uses, and reject a decoded LCN at or beyond nr_clusters in the mapping pairs decoder. Conforming volumes are unaffected.