CVE-2026-23435

A flaw was found in the Linux kernel's performance monitoring unit (PMU) subsystem. A race condition can occur during the unthrottling of performance events, leading to a mismatch between active performance counters and their corresponding event pointers. This can result in a NULL pointer dereference within the PMU's Non-Maskable Interrupt (NMI) handler, causing the system to crash and resulting in a Denial of Service (DoS).