SB20260528221 - Out-of-bounds write in Linux kernel amd amdgpu driver
Published: May 28, 2026
Security Bulletin ID
SB20260528221
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-45853)
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 memory corruption in amdgpu_gmc_get_nps_memranges() when freeing memory allocated by amdgpu_discovery_get_nps_info(). A local user can trigger the vulnerable code path to cause a denial of service.
The issue occurs because memory allocated with kvcalloc() may be backed by vmalloc() for large allocations.
Remediation
Install update from vendor's website.