CVE-2026-98013

A flaw was found in the Linux kernel. A local user with network administration privileges, including within a user namespace, can cause a Denial of Service (DoS) by configuring the Flow Queue Proportional Integral controller Enhanced (FQ-PIE) packet scheduler with an excessively low quantum value and a crafted packet size table. This lack of proper input validation causes an internal deficit-refill loop to spin excessively while holding a kernel lock, resulting in a soft lockup that leaves the system unresponsive.

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.