CVE-2026-68233
drm/vc4: Shut down BO cache timer before teardown
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().
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Use timer_shutdown_sync() to shut down the BO cache timer.
- Cancel the work synchronously after timer shutdown.
- Ensure timer cannot be rearmed after shutdown.
- Apply the provided patch for the Linux kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68233.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68233 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68233
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68233 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68233 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c826a6e1064419f78855463cf29ce9e8b9d25bf4', 'lessThan': 'a38f2724eb93a78ba250b01e0caf3468df4d3956', 'versionType': 'git'}, {'status': 'affected', 'version': 'c826a6e1064419f78855463cf29ce9e8b9d25bf4', 'lessThan': 'bac4c1a9af690b8635c6924872075c41d8763ed9', 'versionType': 'git'}, {'status': 'affected', 'version': 'c826a6e1064419f78855463cf29ce9e8b9d25bf4', 'lessThan': '6273dd3ffb54ec581855b82ae77331b66028249c', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/vc4/vc4_bo.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/vc4/vc4_bo.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c826a6e1064419f78855463cf29ce9e8b9d25bf4', 'lessThan': 'a38f2724eb93a78ba250b01e0caf3468df4d3956', 'versionType': 'git'}, {'status': 'affected', 'version': 'c826a6e1064419f78855463cf29ce9e8b9d25bf4', 'lessThan': 'bac4c1a9af690b8635c6924872075c41d8763ed9', 'versionType': 'git'}, {'status': 'affected', 'version': 'c826a6e1064419f78855463cf29ce9e8b9d25bf4', 'lessThan': '6273dd3ffb54ec581855b82ae77331b66028249c', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/vc4/vc4_bo.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/vc4/vc4_bo.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'c826a6e1064419f78855463cf29ce9e8b9d25bf4', 'lessThan': 'a38f2724eb93a78ba250b01e0caf3468df4d3956', 'versionType': 'git'}, {'status': 'affected', 'version': 'c826a6e1064419f78855463cf29ce9e8b9d25bf4', 'lessThan': 'bac4c1a9af690b8635c6924872075c41d8763ed9', 'versionType': 'git'}, {'status': 'affected', 'version': 'c826a6e1064419f78855463cf29ce9e8b9d25bf4', 'lessThan': '6273dd3ffb54ec581855b82ae77331b66028249c', 'versionType': 'git'}], 'programFiles': ['drivers/gpu/drm/vc4/vc4_bo.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/gpu/drm/vc4/vc4_bo.c'], 'defaultStatus': 'affected'}] Added 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(). Added Reference https://git.kernel.org/stable/c/6273dd3ffb54ec581855b82ae77331b66028249c Added Reference https://git.kernel.org/stable/c/a38f2724eb93a78ba250b01e0caf3468df4d3956 Added Reference https://git.kernel.org/stable/c/bac4c1a9af690b8635c6924872075c41d8763ed9