Search: CVE-2026-63875

A vulnerability in the Linux kernel's arm64 architecture related to TLB (Translation Lookaside Buffer) cache flushing was resolved. The flaw involved improper invalidation of the walk cache when unsharing PMD tables, potentially causing stale page table entries to remain and leading to incorrect page table walks. This issue was fixed by ensuring the walk cache is properly invalidated during unsharing operations. The vulnerability has a CVSS score of 7.8, indicating high impact on confidentiality, integrity, and availability. Multiple Linux kernel versions are affected, and a patch is available.