CVE-2024-50108

What it actually does

The flaw in the AMD display driver causes kernel warnings and temporary black screens when dmub_psr_enable() is called with PSR-SU active on Parade 08-01 TCON hardware during boot or fullscreen video.

Why it matters to the business

Users experience brief display blackouts that interrupt normal operation on affected Linux systems; the low EPSS and absence from KEV indicate limited real-world risk despite the DoS classification.

How an attack unfolds

Normal system activity such as boot or VA-API video playback invokes PSR-SU on the Parade 08-01 TCON, triggering the unhandled failure path inside dmub_psr_enable() and resulting in the observed black screen and warning traces.

How to fix it

Apply the upstream fix that disables PSR-SU for Parade 08-01 TCON; monitor DMUB traces for further root-cause analysis before re-enabling the feature.

How to confirm the fix worked

Confirm the patch is present by checking for the commit afb634a6823d8d9db23c5fb04f79c5549349628b or equivalent in the running kernel; test boot and fullscreen video on Parade 08-01 hardware for absence of black screens and warnings.

Typical attack path

1. System boots or launches fullscreen video playback
2. AMD display driver enables PSR-SU for Parade 08-01 TCON
3. dmub_psr_enable() encounters failure state
4. Kernel emits WARNING and display blanks for approximately one second

How to detect it

Review kernel logs for WARNING traces referencing dmub_psr_enable() and Parade 08-01 TCON around boot or video events; correlate with display subsystem activity.

What your security team should do

• Prioritize kernel updates containing the PSR-SU disable for Parade 08-01 TCON on affected AMD systems
• Monitor EPSS trend (stable at ~0.0024) and absence from KEV for ongoing risk assessment
• Document any observed DMUB traces for potential future driver improvements