Out-of-bounds write in Linux kernel - CVE-2026-31766
Published: May 2, 2026
Vulnerability identifier: #VU128933
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31766
CWE-ID: CWE-787
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 corrupt kernel memory.
The vulnerability exists due to an out-of-bounds write in amdgpu_userq_get_doorbell_index() when creating a user queue with a crafted doorbell_offset value. A local user can supply an arbitrarily large doorbell_offset to corrupt kernel memory.
How to mitigate CVE-2026-31766
Install security update from vendor's repository.