PT-2025-49640 · Linux+1 · Linux Kernel+1

Published 2025-12-09 · Updated 2026-05-26 · CVE-2023-53780

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel's DRM/AMD/display component related to FCLK pstate changes underflow. The issue arises from calculating the FCLK p-state change watermark based on dummy p-state latency when UCLK p-state support is absent. This is corrected by calculating the watermark based on FCLK pstate change latency when UCLK p-state is not supported.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Related Identifiers

CVE-2023-53780

RHSA-2023:6583

RHSA-2023:7077

SUSE-SU-2026:0263-1

SUSE-SU-2026:0317-1

Affected Products

Debian

Linux Kernel

References · 855

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53780.json · Exploit
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2023-53780 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0317-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53780 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-53780 · Security Note
• https://osv.dev/vulnerability/CVE-2023-53780 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53780 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53780 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53780 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53780 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0263-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2023-53780 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53780 · Vendor Advisory
• https://bugzilla.suse.com/1255760 · Note
• https://bugzilla.suse.com/1256204 · Note