Improper input validation in Linux kernel - CVE-2026-43169
Published: May 7, 2026
Vulnerability identifier: #VU130561
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-2026-43169
CWE-ID: CWE-20
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 improper input validation in drm/buddy allocation handling when processing allocation requests with a rounded size that exceeds the available memory manager size. A local user can submit a crafted allocation request to cause a denial of service.
The issue is triggered when size rounding for contiguous, non-contiguous, or large min_block_size allocations produces a value larger than mm->size, leading to a BUG_ON condition.
How to mitigate CVE-2026-43169
Install security update from vendor's repository.