Answer in brief
CVE-2026-89586 records a High severity (CVSS 8.2) vulnerability in ata: libata-scsi: fix DSM TRIM for sector sizes larger than 2048 bytes. 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 8.2. 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 | >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <04e2befe25792f2e90097f284d7e86fc6bcfe928 || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <c2e3dccd6870659851eaa4c12ab16418b8e3040a || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <4a4268a0b0a595bd9534cf9c7fda93775a7d8a0d || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <79cce911e623c0baa0fde307ce3a434e084b881a | 04e2befe25792f2e90097f284d7e86fc6bcfe928, c2e3dccd6870659851eaa4c12ab16418b8e3040a, 4a4268a0b0a595bd9534cf9c7fda93775a7d8a0d, 79cce911e623c0baa0fde307ce3a434e084b881a |
| Linux/Linuxgeneric | 4.9 | Not reported |
| Linux/Linuxgeneric | >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <07975b8daa3b0ab3cbc02cc48ea7bc48fadcec53 || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <b7b5ab2df325ffbbad7ca2debaa071e024d68cb5 || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <07baa310ea3224a7044b1ca84796bb37a235af1f || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <977554ed91b54075fbc0bac536316b4841ef6258 || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <04e2befe25792f2e90097f284d7e86fc6bcfe928 || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <c2e3dccd6870659851eaa4c12ab16418b8e3040a || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <4a4268a0b0a595bd9534cf9c7fda93775a7d8a0d || >=ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff <79cce911e623c0baa0fde307ce3a434e084b881a | 07975b8daa3b0ab3cbc02cc48ea7bc48fadcec53, b7b5ab2df325ffbbad7ca2debaa071e024d68cb5, 07baa310ea3224a7044b1ca84796bb37a235af1f, 977554ed91b54075fbc0bac536316b4841ef6258, 04e2befe25792f2e90097f284d7e86fc6bcfe928, c2e3dccd6870659851eaa4c12ab16418b8e3040a, 4a4268a0b0a595bd9534cf9c7fda93775a7d8a0d, 79cce911e623c0baa0fde307ce3a434e084b881a |
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: ata: libata-scsi: fix DSM TRIM for sector sizes larger than 2048 bytes ata_scsi_write_same_xlat() translates a SCSI WRITE SAME command with the UNMAP bit set into an ATA DATA SET MANAGEMENT TRIM command. The TRIM descriptor is built by ata_format_dsm_trim_descr() into the 2048-byte ata_scsi_rbuf staging buffer, and the number of bytes copied is compared against the logical sector size by the caller: size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block); if (size != len) /* len == sdp->sector_size */ goto invalid_param_len; ata_format_dsm_trim_descr() clamps the copy length to ATA_SCSI_RBUF_SIZE (2048). On a device whose logical sector size exceeds that (e.g. a 4Kn device, where sector_size == 4096) the function can never return more than 2048, while the caller expects it to return sector_size. The comparison therefore always fails, so every TRIM is rejected with "Parameter list length error" and WARN_ON() splats on each attempt. TRIM / discard is thus completely broken on such devices. The descriptor was incorrectly sized from the logical sector size. A DSM TRIM payload is a list of 512-byte pages, each holding up to ATA_MAX_TRIM_RNUM (64) LBA Range Entries, and is independent of the logical sector size. The Block Limits VPD page already advertises a single such page as the maximum WRITE SAME length (65535 * ATA_MAX_TRIM_RNUM logical blocks), so the block layer never sends a request that needs more than one page. Emit exactly one 512-byte page, independent of the logical sector size, and transfer only that page (COUNT == 1). For a 512-byte-sector device this is unchanged; devices with larger logical sectors now work instead of failing every TRIM.
Quoted source text, attributed separately from HOL analysis.