CVE-2026-43326
Description
A flaw was found in the Linux kernel, specifically within the sched_ext component. This vulnerability can lead to a system-wide deadlock, causing a Denial of Service (DoS) where the system becomes unresponsive. The issue arises when the kernel's scheduling mechanism enters a busy-wait state in a critical section, preventing processors from performing other tasks. If multiple processors become stuck in this waiting loop, the entire system can freeze.
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Other); DoS: Crash, Exit, or Restart
Each thread of execution will "hang" and prevent tasks from completing. In some cases, CPU consumption may occur if a lock check occurs in a tight loop.
Frequently Asked Questions
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