# CVE-2023-52586: drm/msm/dpu: Add mutex lock in control vblank irq

CVE-2023-52586 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52586, released March 6, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-52586
- Priority: High
- CVSS: 7.0 (high)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 6, 2024
- Weakness: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-52586

## Description

In the Linux kernel, the following vulnerability has been resolved:  drm/msm/dpu: Add mutex lock in control vblank irq  Add a mutex lock to control vblank irq to synchronize vblank enable/disable operations happening from different threads to prevent race conditions while registering/unregistering the vblank irq callback.  v4: -Removed vblank_ctl_lock from dpu_encoder_virt, so it is only a     parameter of dpu_encoder_phys.     -Switch from atomic refcnt to a simple int counter as mutex has     now been added v3: Mistakenly did not change wording in last version. It is done now. v2: Slightly changed wording of commit message  Patchwork: https://patchwork.freedesktop.org/patch/571854/

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.7.7-1 | [DEBIAN-CVE-2023-52586](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52586.md) | Mar 6, 2024 |
| Linux | linux Debian 14 | 6.7.7-1 | [DEBIAN-CVE-2023-52586](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52586.md) | Mar 6, 2024 |

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