SB20260528199 - Out-of-bounds write in Linux kernel amd amdkfd driver

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Main Vulnerability Database SB20260528199

SB20260528199 - Out-of-bounds write in Linux kernel amd amdkfd driver

Published: May 28, 2026

Security Bulletin ID SB20260528199
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-45878)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an out-of-bounds write in the debug address watch handling in drm/amdkfd when processing a crafted watch_id value from userspace. A local user can supply a watch_id larger than INT_MAX to trigger memory access outside the watch_points array and cause a denial of service.

The issue is triggered by integer sign conversion of an unsigned watch_id to a signed value, which can also lead to invalid shift operations.


Remediation

Install update from vendor's website.

References