Out-of-bounds write in Linux kernel - CVE-2026-45853
Published: May 28, 2026
Vulnerability identifier: #VU132633
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-2026-45853
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 cause a denial of service.
The vulnerability exists due to memory corruption in amdgpu_gmc_get_nps_memranges() when freeing memory allocated by amdgpu_discovery_get_nps_info(). A local user can trigger the vulnerable code path to cause a denial of service.
The issue occurs because memory allocated with kvcalloc() may be backed by vmalloc() for large allocations.
How to mitigate CVE-2026-45853
Install security update from vendor's repository.