cve-2026-31686

CVE-2026-31686 is a Linux kernel memory-management vulnerability affecting KASAN page-table teardown logic, where an incorrect alignment assumption can cause a double free during PMEM unmapping. This issue is particularly relevant for systems using POWER architecture, persistent memory, or security-instrumented kernels in enterprise environments. Although the public record lacks a full NVD CVSS score, stable-kernel backports indicate maintainers deemed the fix important enough to carry across multiple supported kernel lines. Discussions on WindowsForum.com cover the technical details of the fix, its operational impact, and the broader context of kernel memory safety.