CVE-2023-53780

kernel: drm/amd/display: fix FCLK pstate change underflow

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · December 9, 2025

Updated · July 22, 2026

Description

A calculation flaw was found in the AMD display driver in the Linux kernel. When UCLK p-state is not supported, FCLK p-state change watermarks are incorrectly calculated using dummy values, potentially causing underflow. This can lead to display issues or system instability during power state transitions.

Statement

This is a driver logic bug affecting AMD display power management calculations. Impact is limited to display glitches or driver errors rather than security-relevant memory corruption.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-191 · Integer Underflow (Wrap or Wraparound)