RCU Protection Issue in Linux Kernel Affecting Task Management

CVE-2026-46259

What is CVE-2026-46259?

A vulnerability in the Linux kernel allows improper handling of task management data due to insufficient RCU protection when accessing the real_parent of a task. This flaw can lead to scenarios where a user-after-free (UAF) condition occurs, potentially enabling an attacker to exploit the system through crafted task interactions. A patch has been implemented that replaces the problematic access method with a version that includes proper RCU protection, thus mitigating the risk associated with this executable path.

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