CVE-2025-38564

Name of the Vulnerable Software and Affected Versions: Linux kernel (affected versions not specified)

Description: The perf mmap() function in the Linux kernel does not correctly handle buffer mapping failures. Specifically, if mapping a buffer read-only into the page table fails after successful allocation or attachment, the function leaks reference counts, corrupts user virtual memory accounting, and results in an unbalanced invocation of event::event mapped(). This occurs because the event::event mapped() invocation is performed before the map range() call, and perf mmap close() is not invoked on map range() failure, leading to resource leaks and accounting errors.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.