SB2026050284 - Out-of-bounds write in Linux kernel amd amdgpu driver
Published: May 2, 2026
Security Bulletin ID
SB2026050284
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-31766)
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:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to corrupt kernel memory.
The vulnerability exists due to an out-of-bounds write in amdgpu_userq_get_doorbell_index() when creating a user queue with a crafted doorbell_offset value. A local user can supply an arbitrarily large doorbell_offset to corrupt kernel memory.
Remediation
Install update from vendor's website.