{"cve":"CVE-2026-89781","nvd":{"published":"2026-09-16T09:17:08.667","modified":"2026-10-19T09:18:21.517","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix out-of-bounds read in read_log_rec_buf()\n\nread_log_rec_buf() copies a log record into a caller buffer starting at\n\n\tu32 off = lsn_to_page_off(log, lsn) + log->record_header_len;\n\nlog->record_header_len (and log->data_off, used for the following pages)\ncomes verbatim from the on-disk restart area and is only checked for\n8-byte alignment in is_rst_area_valid(), so off can exceed\nlog->page_size. \"tail = log->page_size - off\" then underflows and\nmemcpy() reads past the page_size-sized buffer returned by\nread_log_page(), spilling adjacent slab memory into the replay buffer.\n\nThis is reachable by mounting a crafted NTFS image:\n\n BUG: KASAN: slab-out-of-bounds in read_log_rec_buf+0x216/0x580\n Read of size 64 at addr ffff88800a877ff8 by task exploit/127\n  read_log_rec_buf fs/ntfs3/fslog.c:2299\n  log_replay fs/ntfs3/fslog.c:4216\n  ntfs_loadlog_and_replay fs/ntfs3/fsntfs.c:324\n  ntfs_fill_super fs/ntfs3/super.c:1392\n  get_tree_bdev_flags fs/super.c:1694\n  __x64_sys_mount fs/namespace.c:4360\n The buggy address is located 4088 bytes to the right of\n the 4096-byte region [ffff88800a876000, ffff88800a877000)\n\nReject an in-page offset outside the current page before the copy.\n\n[almaz.alexandrovich@paragon-software.com: replaced the >= sign with >]","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.4},"cwes":[],"references":["https://git.kernel.org/stable/c/1b2d31f1083beb80c55d1152249f652c1445a559","https://git.kernel.org/stable/c/49f7cbc902b08b56eb7d2633163ecc57a0e7145a","https://git.kernel.org/stable/c/53e56f7aa1d0f950a8bc2e4cdb3ba9fe45967531","https://git.kernel.org/stable/c/700973cc65db405bde0368ccf88699390150943e","https://git.kernel.org/stable/c/74a83aa05f73033af719771ab1f0c269928b4865"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:54:41.405518556+00:00"},"epss":{"cve":"CVE-2026-89781","score":0.00185,"percentile":0.08013,"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."]}