CVE-2023-52485

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 303197775a97416b62d4da69280d0c120a20e009affected
LinuxLinux4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < 8892780834ae294bc3697c7d0e056d7743900b39affected
LinuxLinux4.15affected
LinuxLinux0 < 4.15unaffected
LinuxLinux6.7.3 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References