CVE-2025-38080

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Increase block_sequence array size

[Why] It's possible to generate more than 50 steps in hwss_build_fast_sequence, for example with a 6-pipe asic where all pipes are in one MPC chain. This overflows the block_sequence buffer and corrupts block_sequence_steps, causing a crash.

[How] Expand block_sequence to 100 items. A naive upper bound on the possible number of steps for a 6-pipe asic, ignoring the potential for steps to be mutually exclusive, is 91 with current code, therefore 100 is sufficient.

This vulnerability poses no risk to Red Hat offerings as the affected display driver code is not present in supported Red Hat Enterprise Linux kernel releases. In upstream Linux environments, the flaw is restricted to a local denial-of-service condition that requires physical access or specialized multi-pipe AMD graphics configurations. Because the prerequisites involve specific multi-display hardware pipelines and lack remote vectors, system availability is only threatened in niche local workstation configurations.