What’s Vulnerable › Vulnerabilities

CVE-2026-89820: drm/amd/display: fix dc_lock leak on GPU reset error paths

• Severity: unknown
• 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: 2026-09-16 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix dc_lock leak on GPU reset error paths On GPU reset, dm_suspend() takes dc_lock and leaves it for dm_resume() to drop. If amdgpu_dm_commit_zero_streams() or dm_dmub_hw_init() fails, the function returns with the lock still held. The matching resume path is then skipped, so every later dc_lock take hangs. Release the cached DC state and unlock before returning the error.

Affected products

• Linux kernel: 6.15 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/295d2bf42061db490254e748f9344545bb7faf19
• https://git.kernel.org/stable/c/92a9eebd2a1f892fe482154d83f9f1626bc73d3b
• https://git.kernel.org/stable/c/dac29cbb405b912742f4f7eda833cec8e7a53780

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