CVE-2026-68233
Received Received - Intake

Linux Kernel Memory Leak in VC4 DRM Driver

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Shut down BO cache timer before teardown The BO cache timer callback schedules time_work, and time_work can rearm the timer through vc4_bo_cache_free_old(). vc4_bo_cache_destroy() deletes the timer and then cancels the work, which does not break that cycle: the work being cancelled can rearm the timer, and the timer then queues work again after teardown. Use timer_shutdown_sync() instead, so the timer cannot be rearmed and the cycle ends with cancel_work_sync().

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-68233
EUVD
EUVD-2026-55334

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a Linux kernel vulnerability where a timer and work queue cycle is not properly shut down. The BO cache timer can rearm itself through a work queue, and the cleanup process fails to break this cycle, potentially causing issues during system teardown.

Impact Analysis

This vulnerability may lead to system instability or crashes during shutdown or cleanup operations in systems running affected Linux kernel versions. It could cause resource leaks or unexpected behavior in graphics-related components.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for CVE-2026-68233. The vulnerability is resolved by using timer_shutdown_sync() to prevent the timer from being rearmed during teardown.

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