SB20260917162 - Use of Uninitialized Variable in Linux kernel amd amdkfd driver
Published: September 17, 2026
Security Bulletin ID
SB20260917162
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of Uninitialized Variable (CVE-ID: CVE-2026-89808)
CWE-ID: CWE-457 - Use of Uninitialized Variable
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use of an uninitialized variable in the drm/amdkfd svm_migrate_copy_to_vram function when migrating a VM range containing a hole from CPU memory to VRAM. A local user can trigger the migration of such a VM range to cause a denial of service.
Remediation
Install update from vendor's website.