Use-after-free in Linux kernel - CVE-2026-43237
Published: May 7, 2026
Vulnerability identifier: #VU130503
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-43237
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in amdgpu_gem_va_ioctl when handling VA mapping updates and GPU timeline management. A local user can trigger the ioctl in a way that causes stale or freed dma_fence objects to be used to cause a denial of service.
The issue can lead to refcount underflows and kernel panic during GPU timeline updates.
How to mitigate CVE-2026-43237
Install security update from vendor's repository.