Improper Initialization in Linux kernel - CVE-2026-43477
Published: May 14, 2026
Vulnerability identifier: #VU131436
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43477
CWE-ID: CWE-665
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 hardware register initialization order in the i915 VRR timing configuration logic when handling failed display link training. A local user can trigger display configuration involving VRR after a link training failure to cause a denial of service.
The issue was observed on ICL systems with an external display connected through a dock using a faulty type-C cable, while TGL systems appeared unaffected.
How to mitigate CVE-2026-43477
Install security update from vendor's repository.