CVE-2026-99255

A flaw was found in the Linux kernel's io_uring subsystem. This flaw allows a local user to cause a Denial of Service (DoS) by executing chained asynchronous operations before terminating a task. Due to a race condition in the asynchronous work queue cleanup handler, an exiting process can overlook an in-flight linked request and enter an unrecoverable sleep state. Consequently, the affected process or thread hangs indefinitely and cannot be terminated.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.