Kernel Memory Mapping Vulnerability in Linux Kernel

CVE-2025-21778

Summary

A memory mapping vulnerability exists within the Linux kernel's tracing subsystem, specifically related to the mapping of persistent ring buffers. The issue arises when attempting to use mmap() on an instance linked to reserved memory, potentially causing a page fault and resulting in system crashes. This vulnerability occurs due to improper virtual address handling in the kernel's ring buffer mapping, affecting the stability and reliability of kernel operations.

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