CVE-2023-52485Medium· 5.5▾ SunlitIn 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 exec…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
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.
linux_kernel < 6.7.3Upgrade past the affected range:
linux_kernel 6.7.3Connected by shared product, vendor, weakness, or advisory.
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