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

CVE-2023-52485 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52485, released February 29, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-52485
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 29, 2024
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-52485

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.7.7-1 | [DEBIAN-CVE-2023-52485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52485.md) | Feb 29, 2024 |
| Linux | linux Debian 14 | 6.7.7-1 | [DEBIAN-CVE-2023-52485](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52485.md) | Feb 29, 2024 |

---

Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.