CVE-2026-89586 Linux Kernel - Denial of Service

Linux kernel contains a broken TRIM command handling vulnerability in ata_scsi_write_same_xlat due to incorrect sizing of DSM TRIM descriptors for sector sizes larger than 2048 bytes, letting attackers cause TRIM commands to fail on 4Kn devices, exploit requires usage of devices with large logical sector sizes.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.61% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for DSM TRIM handling.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs