Answer in brief
CVE-2026-89782 records a Unknown severity vulnerability in fs/ntfs3: reject restart table growth beyond U16_MAX entries. 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 <caa0ec3fc44a13d7c21d78e4722f4f05f87ccf56 || >=b46acd6a6a627d876898e1c84d3f84902264b445 <339e59996ff193adcf1c438cf05f19e753beb3a7 || >=b46acd6a6a627d876898e1c84d3f84902264b445 <ecde45cd81dc28f5696c312c5ce5a509962e9ab1 || >=b46acd6a6a627d876898e1c84d3f84902264b445 <be218a01aadffe33ed4fc73e25276d676ebbd09d || >=b46acd6a6a627d876898e1c84d3f84902264b445 <aad605a450611e2a7b7cf9dd5724004d39192bfb || >=b46acd6a6a627d876898e1c84d3f84902264b445 <967a5ff8a614d10126b6d46db1ac040948d6cb42 || >=b46acd6a6a627d876898e1c84d3f84902264b445 <111f8d74a19d85942ecbb3aba78f6f3c88e59391 | caa0ec3fc44a13d7c21d78e4722f4f05f87ccf56, 339e59996ff193adcf1c438cf05f19e753beb3a7, ecde45cd81dc28f5696c312c5ce5a509962e9ab1, be218a01aadffe33ed4fc73e25276d676ebbd09d, aad605a450611e2a7b7cf9dd5724004d39192bfb, 967a5ff8a614d10126b6d46db1ac040948d6cb42, 111f8d74a19d85942ecbb3aba78f6f3c88e59391 |
| 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: reject restart table growth beyond U16_MAX entries During $LogFile replay, log_replay() indexes the transaction table by the transact_id taken from the log record header. check_log_rec() only verifies that transact_id is non-zero and properly aligned, not its magnitude, so a crafted image can request an arbitrarily large index. alloc_rsttbl_from_idx() grows the table to cover that index via extend_rsttbl(), which passes the new entry count to init_rsttbl(): rt = init_rsttbl(esize, used + add); used + add is computed as u32 but init_rsttbl() takes a u16, and the count is stored in struct RESTART_TABLE as a __le16. When used + add exceeds U16_MAX it is truncated, init_rsttbl() allocates a table far smaller than the index requires, and alloc_rsttbl_from_idx() then dereferences and writes at the original, untruncated offset -- an out-of-bounds access past the allocation, reachable by mounting a crafted NTFS image. BUG: KASAN: use-after-free in alloc_rsttbl_from_idx (fs/ntfs3/fslog.c:950) Read of size 4 at addr ffff8880327ffff8 by task exploit alloc_rsttbl_from_idx (fs/ntfs3/fslog.c:950) log_replay (fs/ntfs3/fslog.c:4562) ntfs_loadlog_and_replay (fs/ntfs3/fsntfs.c:324) ntfs_fill_super (fs/ntfs3/super.c:1393) get_tree_bdev_flags vfs_get_tree path_mount __x64_sys_mount A restart table is limited to U16_MAX entries by its __le16 count, so a larger growth request is invalid input. Reject it in extend_rsttbl(); all callers already handle a NULL return.
Quoted source text, attributed separately from HOL analysis.