Memory Management Bugs in Linux Kernel Affecting IPv6 Anycast Functionality

CVE-2026-53259

What is CVE-2026-53259?

A use-after-free vulnerability in the Linux kernel's IPv6 anycast functionality can lead to serious memory management issues. The flaw emerges during the insertion of address cache entries into the global hash while improperly handling concurrent operations. This opens a window of opportunity for a race condition, where a reference to a freed memory structure may still be accessed by other processes. If exploited, this vulnerability can result in unstable system behavior and potential crashes, underscoring the criticality of addressing concurrency issues in memory management within the kernel.

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