CVE-2026-89617
CVE CVE-2026-89617EUVD EUVD-2026-76529Published 2026-09-11T19:45:16.000ZLast changed 2026-09-14T12:01:33.000ZCVSS 7.8
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.12.109; b46acd6a6a627d876898e1c84d3f84902264b445 <1e90b1703ee1a04cd3e9e399353fc536f5f3ba10; patch: 6.1.188; patch: 6.18.50; b46acd6a6a627d876898e1c84d3f84902264b445 <d23155634a4bc1183e761d5eb2c043b2e693cc98; 5.15; b46acd6a6a627d876898e1c84d3f84902264b445 <1200c2779c43b62656ccbb67df9468a7a9af2484; b46acd6a6a627d876898e1c84d3f84902264b445 <2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56; patch: 0; b46acd6a6a627d876898e1c84d3f84902264b445 <0908da07c23be4f94b99dfd9a94765525f0fe4bd; patch: 7.3-rc1; b46acd6a6a627d876898e1c84d3f84902264b445 <006cb7713dec10368e699abc4367e5faa334c9a5; patch: 7.2.4; b46acd6a6a627d876898e1c84d3f84902264b445 <0e07ea2fc45a7b4757ef7bf1f692cc0180a08323; patch: 6.6.157; patch: 5.15.221
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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