What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.0 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: 2024-03-06 · updated 2026-10-30
• Weakness: CWE-362

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/

Affected products

• Linux kernel: before 6.7.4 — fixed in 6.7.4
• Linux: 4.19 — fixed in 6.8

How to fix

Upgrade to a fixed version: Linux kernel 6.7.4; Linux 6.8. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/14f109bf74dd67e1d0469fed859c8e506b0df53f
• https://git.kernel.org/stable/c/45284ff733e4caf6c118aae5131eb7e7cf3eea5a
• https://git.kernel.org/stable/c/763ca8d84f34d1db00d5750f77e6001765916d44
• https://git.kernel.org/stable/c/f6dd625053726ea2a209282bee97218f2ec04149
• https://git.kernel.org/stable/c/14f109bf74dd67e1d0469fed859c8e506b0df53f
• https://git.kernel.org/stable/c/45284ff733e4caf6c118aae5131eb7e7cf3eea5a

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