Answer in brief
CVE-2026-89781 records a Unknown severity 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.
A CVSS score is not reported in the current record. 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
Sep 16, 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.