CVE-2026-89617fs/ntfs3: validate dirty page table on log replay
- 7.8HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% 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: validate dirty page table on log replay Each DIR_PAGE_ENTRY ends in a page_lcns[] array whose length is the on-disk lcns_follow field. check_rstbl() validates the table bookkeeping but never checks that this array fits in the entry, so a crafted lcns_follow lets the v0->v1 conversion memmove and later replay passes run off the entry. Add check_dp_table() to reject, right after check_rstbl(), any entry larger than its size claims via struct_size() (the same expression used to allocate these entries, so the check is overflow-safe by construction). All consumers can then trust lcns_follow as the real capacity. This covers every page_lcns[] access whose index is bounded by the entry itself (the conversion memmove, the HotFix store via find_dp(), and the self-bounded scan loops). Accesses whose index comes from the log record need a separate bound and are handled in a follow-up patch.
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 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 0e07ea2fc45a7b4757ef7bf1f692cc0180a08323
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 1e90b1703ee1a04cd3e9e399353fc536f5f3ba10
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < d23155634a4bc1183e761d5eb2c043b2e693cc98
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 1200c2779c43b62656ccbb67df9468a7a9af2484
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 0908da07c23be4f94b99dfd9a94765525f0fe4bd
- affected b46acd6a6a627d876898e1c84d3f84902264b445 – < 006cb7713dec10368e699abc4367e5faa334c9a5
- 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/0e07ea2fc45a7b4757ef7bf1f692cc0180a08323 (opens in a new tab)
- https://git.kernel.org/stable/c/1e90b1703ee1a04cd3e9e399353fc536f5f3ba10 (opens in a new tab)
- https://git.kernel.org/stable/c/d23155634a4bc1183e761d5eb2c043b2e693cc98 (opens in a new tab)
- https://git.kernel.org/stable/c/1200c2779c43b62656ccbb67df9468a7a9af2484 (opens in a new tab)
- https://git.kernel.org/stable/c/2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56 (opens in a new tab)
- https://git.kernel.org/stable/c/0908da07c23be4f94b99dfd9a94765525f0fe4bd (opens in a new tab)
- https://git.kernel.org/stable/c/006cb7713dec10368e699abc4367e5faa334c9a5 (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-2026-76529 (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-2026-89617)Record last updated .