CVE-2021-47534

MediumCVSS 4.1/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 4.1/10CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= 9ec03d7f1ed394897891319a4dda75f52c5d292d, < 53f9601e908d42481addd67cdb01a9288c611124; >= 9ec03d7f1ed394897891319a4dda75f52c5d292d, < 049cfff8d53a30cae3349ff71a4c01b7d9981bc2
LinuxLinux5.12

References

Timeline

Published
May 24, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2021-47534: Medium severity, CVSS 4.1 | Vulnix