{"id":"CVE-2026-89781","title":"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) + …","summary":"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) + …","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < df099bfdb57773ba7f40f8a9dcc82e75af277922","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 1b2d31f1083beb80c55d1152249f652c1445a559","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 700973cc65db405bde0368ccf88699390150943e","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 49f7cbc902b08b56eb7d2633163ecc57a0e7145a","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 74a83aa05f73033af719771ab1f0c269928b4865","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 53e56f7aa1d0f950a8bc2e4cdb3ba9fe45967531","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < de603b9d377fab57a5e6432fa84a9f36b32c1636","Linux 5.15"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:07.470","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89781","references":[{"url":"https://git.kernel.org/stable/c/1b2d31f1083beb80c55d1152249f652c1445a559","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/49f7cbc902b08b56eb7d2633163ecc57a0e7145a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/53e56f7aa1d0f950a8bc2e4cdb3ba9fe45967531","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/700973cc65db405bde0368ccf88699390150943e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/74a83aa05f73033af719771ab1f0c269928b4865","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/de603b9d377fab57a5e6432fa84a9f36b32c1636","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/df099bfdb57773ba7f40f8a9dcc82e75af277922","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T08:52:29.593Z","epss":0.00182,"epssPercentile":0.08053,"slug":"CVE-2026-89781","body":"## Overview\n\nIn 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 >]\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205273,"id":"CVE-2026-89781","ts":1789570706042,"field":"cvss","old":null,"new":"8.4"},{"seq":205272,"id":"CVE-2026-89781","ts":1789570706042,"field":"severity","old":"none","new":"high"}]}