Improper Cleanup in Linux Kernel Affecting DRM Subsystem by Vendor

CVE-2025-71141

What is CVE-2025-71141?

The Linux Kernel’s DRM subsystem contains an improper cleanup vulnerability that emerges during probe deferral scenarios. Specifically, the drm_kms_helper_poll_fini() and drm_atomic_helper_shutdown() helpers are called unconditionally in the tilcdc_fini() function, which can lead to warnings when the device is not successfully registered. This issue stems from an ineffective cleanup path that lacks proper error handling, potentially impacting system stability and resource management. The fix addresses this by implementing a standard error handling pattern, ensuring cleanup is executed only for successfully initialized resources.

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