Linux Kernel Vulnerability in dm-mirror Log Functionality

CVE-2022-49710

Summary

A vulnerability exists in the dm-mirror functionality of the Linux kernel that involves an issue with rounding up the region bitmap size to BITS_PER_LONG. The vulnerability is due to incorrect handling of bitset size, which can allow access beyond the allocated memory on 64-bit architectures when using unsigned long pointers. This flaw was identified through testing with the LVM2 testsuite and could have implications for system stability and data integrity.

References