CVE-2026-89615fs/ntfs3: bound page_lcns[] index by the log record
- 8.4HighCVSS base score
- 0.15%Exploitation in 30 daysEPSS · top 96% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound page_lcns[] index by the log record The copy_lcns loop and the redo shorten loop index page_lcns[] at j + i, where i runs up to the log record's lcns_follow. That count is checked only against the record's own length, not the target entry, so check_dp_table() (which validates the entry's lcns_follow) does not cover it: the copy_lcns entry may even be freshly allocated after that check, and find_dp() bounds j but not i. A crafted record thus overflows page_lcns[] of an otherwise valid entry. Add dp_range_ok() and reject, before each loop, any record whose run does not fit the entry. These are the only two page_lcns[] accesses indexed by the record rather than the entry, so together with the entry validation every access is now bounded. [[email protected]: original patch contained changes to the problem already handled, applied partly]
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.4.
Affected products
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 31fdd11f75da9823500168cecb07aa45130915a3
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < bb742d1030864c0fe140666f639428ba4e90b2ca
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 61ca8cbbf68f77f25b699ed4358bd232f94ed43b
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < f4c1bc6d7331f344ffcea93c2a37badcbe15baa6
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 7ccb94901f38a062034b56b43c774050b113758f
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 1135ebc225996b3ac1a295652b19a0a706737a6c
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 6f7b9dbdc1b7520206abce0049bdd143eb536e75
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References7
- https://git.kernel.org/stable/c/31fdd11f75da9823500168cecb07aa45130915a3 (opens in a new tab)
- https://git.kernel.org/stable/c/bb742d1030864c0fe140666f639428ba4e90b2ca (opens in a new tab)
- https://git.kernel.org/stable/c/61ca8cbbf68f77f25b699ed4358bd232f94ed43b (opens in a new tab)
- https://git.kernel.org/stable/c/f4c1bc6d7331f344ffcea93c2a37badcbe15baa6 (opens in a new tab)
- https://git.kernel.org/stable/c/7ccb94901f38a062034b56b43c774050b113758f (opens in a new tab)
- https://git.kernel.org/stable/c/1135ebc225996b3ac1a295652b19a0a706737a6c (opens in a new tab)
- https://git.kernel.org/stable/c/6f7b9dbdc1b7520206abce0049bdd143eb536e75 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76527 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89615)Record last updated .