CVE-2026-68233

kernel: drm/vc4: Shut down BO cache timer before teardown

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 10, 2026

Updated · October 30, 2026

Description

A flaw was found in the drm/vc4 component of the Linux kernel. A logic error in the BO cache timer shutdown process allows the timer to be rearmed even after it has been destroyed. This can lead to work being queued again after teardown, potentially causing system instability or a denial of service (DoS) due to improper resource management.

Statement

This issue affects Raspberry Pi vc4 DRM. BO cache timer can rearm after delete during teardown, causing use-after-work. Systems without vc4 are not affected.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-821 · Incorrect Synchronization