CVE-2025-68329

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

Description The Linux kernel contains an issue within the tracing subsystem related to Virtual Memory Area (VMA) handling. Specifically, when a VMA is split, the ring buffer unmap() function can be called multiple times, leading to a WARN ON error due to the user mapped flag being set to 0 prematurely. This occurs because trace buffer mappings require the complete buffer, including the meta page, and do not support partial mappings. The issue is addressed by adding a may split callback that returns -EINVAL, effectively preventing VMA splits for trace buffer mappings.

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