CVE-2026-89574
CVE CVE-2026-89574EUVD EUVD-2026-76486Published 2026-09-11T19:44:42.000ZLast changed 2026-09-13T06:31:11.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: dm array: validate array block headers on read array_block_check() validates blocknr and csum and nothing else, while node_check(), next to it, has bounded the structural fields since both were written. dm_array_cursor_next() takes its loop bound from the on-disk nr_entries and element_at() is unguarded pointer arithmetic, so a count larger than the block holds keeps the cursor in one block while the index grows past it and the read walks off the dm-bufio buffer -- dm_cache_load_mappings() drives it once per cache block at activation. Check the header against itself: reject a zero value_size, require max_entries to equal calc_max_entries() for that value_size and block size, and require nr_entries to fit. Equality rather than an upper bound, since a count below the real capacity trips BUG_ON() in fill_ablock() and trim_ablock(). Metadata dm-array writes satisfies all three.
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 6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <2965787723084835b18dfe993cd450ebf5bd4540; 3.9; 6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <b33f76d33aaeacf3baf3370d8d64985169b36600; 6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <9808ddffb4bc659352df3020cd84d9d864820ee5; patch: 0; patch: 7.3-rc1; patch: 7.2.4; patch: 6.12.109; 6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <67adda7ed5da3e3b64f5b9021a02c21fb374fd9c; patch: 6.18.50
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
Does this concern one of your customers?
This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.
Try it for 28 daysPatchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.