CVE-2021-47534: Linux Kernel

Medium severity, CVSS 4.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: kms: Add missing drm_crtc_commit_put Commit 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a commit") introduced a global state for the HVS, with each FIFO storing the current CRTC commit so that we can properly synchronize commits. However, the refcounting was off and we thus ended up leaking the drm_crtc_commit structure every commit. Add a drm_crtc_commit_put to prevent the leakage.

Affected products

• Linux Linux Kernel: from 5.12, before 5.15.7 (fixed in 5.15.7); version 5.16 only

Published 2024-05-24. Last modified 2026-06-17.