SB20261022121 - Out-of-bounds write in Linux kernel ata driver

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Main Vulnerability Database SB20261022121

SB20261022121 - Out-of-bounds write in Linux kernel ata driver

Published: October 22, 2026

Security Bulletin ID SB20261022121
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-98545)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 5.2 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an attacker with physical access to system to corrupt kernel memory and potentially cause a denial of service.

The vulnerability exists due to out-of-bounds reads and writes in ata_scsi_set_passthru_sense_fields() in the Linux kernel's libata-scsi component when processing a device's REQUEST SENSE reply after a failed ATA PASS-THROUGH command to an ATAPI device. An attacker with physical access to system can supply a crafted reply through a controlled ATAPI device, manipulating the additional length byte or descriptor layout to trigger accesses beyond the 96-byte sense buffer and potentially crash the kernel.


Remediation

Install update from vendor's website.

References