Answer in brief
CVE-2026-89781 records a High severity (CVSS 8.4) vulnerability in fs/ntfs3: fix out-of-bounds read in read_log_rec_buf(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b46acd6a6a627d876898e1c84d3f84902264b445 <df099bfdb57773ba7f40f8a9dcc82e75af277922 || >=b46acd6a6a627d876898e1c84d3f84902264b445 <1b2d31f1083beb80c55d1152249f652c1445a559 || >=b46acd6a6a627d876898e1c84d3f84902264b445 <700973cc65db405bde0368ccf88699390150943e || >=b46acd6a6a627d876898e1c84d3f84902264b445 <49f7cbc902b08b56eb7d2633163ecc57a0e7145a || >=b46acd6a6a627d876898e1c84d3f84902264b445 <74a83aa05f73033af719771ab1f0c269928b4865 || >=b46acd6a6a627d876898e1c84d3f84902264b445 <53e56f7aa1d0f950a8bc2e4cdb3ba9fe45967531 || >=b46acd6a6a627d876898e1c84d3f84902264b445 <de603b9d377fab57a5e6432fa84a9f36b32c1636 | df099bfdb57773ba7f40f8a9dcc82e75af277922, 1b2d31f1083beb80c55d1152249f652c1445a559, 700973cc65db405bde0368ccf88699390150943e, 49f7cbc902b08b56eb7d2633163ecc57a0e7145a, 74a83aa05f73033af719771ab1f0c269928b4865, 53e56f7aa1d0f950a8bc2e4cdb3ba9fe45967531, de603b9d377fab57a5e6432fa84a9f36b32c1636 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: fix out-of-bounds read in read_log_rec_buf() read_log_rec_buf() copies a log record into a caller buffer starting at u32 off = lsn_to_page_off(log, lsn) + log->record_header_len; log->record_header_len (and log->data_off, used for the following pages) comes verbatim from the on-disk restart area and is only checked for 8-byte alignment in is_rst_area_valid(), so off can exceed log->page_size. "tail = log->page_size - off" then underflows and memcpy() reads past the page_size-sized buffer returned by read_log_page(), spilling adjacent slab memory into the replay buffer. This is reachable by mounting a crafted NTFS image: BUG: KASAN: slab-out-of-bounds in read_log_rec_buf+0x216/0x580 Read of size 64 at addr ffff88800a877ff8 by task exploit/127 read_log_rec_buf fs/ntfs3/fslog.c:2299 log_replay fs/ntfs3/fslog.c:4216 ntfs_loadlog_and_replay fs/ntfs3/fsntfs.c:324 ntfs_fill_super fs/ntfs3/super.c:1392 get_tree_bdev_flags fs/super.c:1694 __x64_sys_mount fs/namespace.c:4360 The buggy address is located 4088 bytes to the right of the 4096-byte region [ffff88800a876000, ffff88800a877000) Reject an in-page offset outside the current page before the copy. [[email protected]: replaced the >= sign with >]
Quoted source text, attributed separately from HOL analysis.