Answer in brief
CVE-2026-89573 records a High severity (CVSS 7.8) vulnerability in dm array: reject an array block whose value size is not the caller's. 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 <7bf4b5cb42a4e27f36bcbc6209d82a5da9c0168c || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <ac4a5eb8b002a0742c938fc98b922e243f53573a || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <cb409b38b0232ee4385ef55cddcd6fbdd011a8a2 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <4538a287bdf5d0f9a379c678e5262b9f5783f547 | 7bf4b5cb42a4e27f36bcbc6209d82a5da9c0168c, ac4a5eb8b002a0742c938fc98b922e243f53573a, cb409b38b0232ee4385ef55cddcd6fbdd011a8a2, 4538a287bdf5d0f9a379c678e5262b9f5783f547 |
| Linux/Linuxgeneric | 3.9 | Not reported |
| Linux/Linuxgeneric | >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <35cd3b278448c79614f65ab6bbc9ed348d847df9 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <a8237cb8fa0a628d903e76635bfdeae4202036b9 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <a530a9a419a7c5fdb7dae55ffa2dd7a130631842 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <522fa26da24ccaa298ebe3c1c97395d2d63dfc21 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <7bf4b5cb42a4e27f36bcbc6209d82a5da9c0168c || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <ac4a5eb8b002a0742c938fc98b922e243f53573a || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <cb409b38b0232ee4385ef55cddcd6fbdd011a8a2 || >=6513c29f44f2cc970c0e9fecfe5a6526c3e73025 <4538a287bdf5d0f9a379c678e5262b9f5783f547 | 35cd3b278448c79614f65ab6bbc9ed348d847df9, a8237cb8fa0a628d903e76635bfdeae4202036b9, a530a9a419a7c5fdb7dae55ffa2dd7a130631842, 522fa26da24ccaa298ebe3c1c97395d2d63dfc21, 7bf4b5cb42a4e27f36bcbc6209d82a5da9c0168c, ac4a5eb8b002a0742c938fc98b922e243f53573a, cb409b38b0232ee4385ef55cddcd6fbdd011a8a2, 4538a287bdf5d0f9a379c678e5262b9f5783f547 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 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: reject an array block whose value size is not the caller's array_block_check() can only compare the header against itself, so a block with value_size 4 and max_entries 1018 is internally consistent and passes. dm-cache keeps two arrays -- mappings at 8 bytes and hints at 4 -- and the roots for both live in the superblock. Point the mappings root at a hint block and __load_mappings() walks it through an info whose value size is 8, so element_at() strides 8 bytes over 4-byte entries and reaches offset 8160 of a 4096-byte block. get_ablock() and __shadow_ablock() are the two places that hold the block and the caller at once. Reject there when the two value sizes disagree. Arrays only ever read their own blocks, so this fires on crafted metadata only.
Quoted source text, attributed separately from HOL analysis.