Answer in brief
CVE-2026-89574 records a High severity (CVSS 7.8) vulnerability in dm array: validate array block headers on read. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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.
CVSS is 7.8. 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <67adda7ed5da3e3b64f5b9021a02c21fb374fd9c || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <b33f76d33aaeacf3baf3370d8d64985169b36600 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <9808ddffb4bc659352df3020cd84d9d864820ee5 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <2965787723084835b18dfe993cd450ebf5bd4540 | 67adda7ed5da3e3b64f5b9021a02c21fb374fd9c, b33f76d33aaeacf3baf3370d8d64985169b36600, 9808ddffb4bc659352df3020cd84d9d864820ee5, 2965787723084835b18dfe993cd450ebf5bd4540 |
| Linux/Linuxgeneric | 3.9 | Not reported |
| Linux/Linuxgeneric | >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <0e3b8f371c385c212b6e6f76c66f5b3f5bcfea62 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <67adda7ed5da3e3b64f5b9021a02c21fb374fd9c || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <b33f76d33aaeacf3baf3370d8d64985169b36600 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <9808ddffb4bc659352df3020cd84d9d864820ee5 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <2965787723084835b18dfe993cd450ebf5bd4540 | 0e3b8f371c385c212b6e6f76c66f5b3f5bcfea62, 67adda7ed5da3e3b64f5b9021a02c21fb374fd9c, b33f76d33aaeacf3baf3370d8d64985169b36600, 9808ddffb4bc659352df3020cd84d9d864820ee5, 2965787723084835b18dfe993cd450ebf5bd4540 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.