Use of Uninitialized Variable in Linux kernel - CVE-2026-89808
Published: September 17, 2026
Vulnerability identifier: #VU150484
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-89808
CWE-ID: CWE-457
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-89808
Install security update from vendor's repository.