Vulnerability in Intel PT Event Handling within Linux Kernel

CVE-2026-93275

What is CVE-2026-93275?

A vulnerability exists in the Linux Kernel affecting Intel PT event handling, specifically related to the pt_event_stop() function. When pt_event_stop() is invoked without the PERF_EF_UPDATE flag, it can lead to an inconsistent state by failing to call perf_aux_output_end(). This situation arises particularly with the group throttling feature introduced in a recent kernel update. The issue may trigger warnings during subsequent operations where performance monitoring event start and stop sequences are not properly balanced, potentially impacting trace data integrity and overall system performance. It's crucial to ensure that these functions are correctly invoked to maintain performance monitoring reliability.

References