CVE-2026-68235

A flaw was found in the Linux kernel's AMD display (drm/amd/display) driver. This vulnerability occurs when handling DisplayPort Multi-Stream Transport (MST) for DCE8-class ASICs, where the system may incorrectly assign an analog encoder that lacks necessary DisplayPort functions. This misassignment can lead to a null pointer dereference, causing the kernel to crash. A local attacker could exploit this to trigger a Denial of Service (DoS).

This issue affects AMD DCE8-class GPUs (e.g. Bonaire) using DisplayPort MST. A second MST stream could be assigned an analog DAC encoder instead of a digital one, causing display failures. Systems without AMD DCE8 hardware are not affected.

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.