Improper initialization in Linux kernel - CVE-2026-89813
Published: September 17, 2026
Vulnerability identifier: #VU150472
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89813
CWE-ID: CWE-665
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 improper initialization in KIQ ring fence handling in amdgpu_device_pre_asic_reset() when the first KIQ submission is made after a MODE1 reset. A local user can trigger the first KIQ submission after a reset to cause a denial of service.
The KIQ ring uses polling fences and has no scheduler.
Affected software
Linux kernel
How to mitigate CVE-2026-89813
Install security update from vendor's repository.