What’s Vulnerable › Vulnerabilities

CVE-2023-52485: drm/amd/display: Wake DMCUB before sending a command

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-29 · updated 2026-08-15

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Wake DMCUB before sending a command [Why] We can hang in place trying to send commands when the DMCUB isn't powered on. [How] For functions that execute within a DC context or DC lock we can wrap the direct calls to dm_execute_dmub_cmd/list with code that exits idle power optimizations and reallows once we're done with the command submission on success. For DM direct submissions the DM will need to manage the enter/exit sequencing manually. We cannot invoke a DMCUB command directly within the DM execution helper or we can deadlock.

Affected products

• Linux kernel: before 6.7.3 — fixed in 6.7.3

How to fix

Upgrade to a fixed version: Linux kernel 6.7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/303197775a97416b62d4da69280d0c120a20e009
• https://git.kernel.org/stable/c/8892780834ae294bc3697c7d0e056d7743900b39
• https://git.kernel.org/stable/c/303197775a97416b62d4da69280d0c120a20e009
• https://git.kernel.org/stable/c/8892780834ae294bc3697c7d0e056d7743900b39

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