Division by zero in Linux kernel - CVE-2026-31767
Published: May 2, 2026
Vulnerability identifier: #VU128934
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-2026-31767
CWE-ID: CWE-369
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 a divide-by-zero error in the i915 dsi driver when determining display timing values in command mode. A local user can trigger driver loading on a system using the affected display configuration to cause a denial of service.
The issue occurs on some machines when the adjusted htotal becomes so small that line_time_us is calculated as zero.
How to mitigate CVE-2026-31767
Install security update from vendor's repository.