ata: libata-scsi: fix DSM TRIM for sector sizes larger than 2048 bytes
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 th
CVE-2026-89586
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89586
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff",
"lessThan": "07975b8daa3b0ab3cbc02cc48ea7bc48fadcec53",
"versionType": "git"
},
{
"status": "affected",
"version": "ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff",
"lessThan": "b7b5ab2df325ffbbad7ca2debaa071e024d68cb5",
"versionType": "git"
},
{
"status": "affected",
"version": "ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff",
"lessThan": "07baa310ea3224a7044b1ca84796bb37a235af1f",
"versionType": "git"
},
{
"status": "affected",
"version": "ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff",
"lessThan": "977554ed91b54075fbc0bac536316b4841ef6258",
"versionType": "git"
},
{
"status": "affected",
"version": "ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff",
"lessThan": "04e2befe25792f2e90097f284d7e86fc6bcfe928",
"versionType": "git"
},
{
"status": "affected",
"version": "ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff",
"lessThan": "c2e3dccd6870659851eaa4c12ab16418b8e3040a",
"versionType": "git"
},
{
"status": "affected",
"version": "ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff",
"lessThan": "4a4268a0b0a595bd9534cf9c7fda93775a7d8a0d",
"versionType": "git"
},
{
"status": "affected",
"version": "ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff",
"lessThan": "79cce911e623c0baa0fde307ce3a434e084b881a",
"versionType": "git"
}
],
"programFiles": [
"drivers/ata/libata-scsi.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/ata/libata-scsi.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89586
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #35094 · Revision 1
- Added to Heist Feed
- Publisher date