CVE-2026-52980

A flaw was found in the Linux kernel's sched/fair scheduler. When a new sched_entity is forked, its rel_deadline may be unexpectedly set, leading to an abnormally large deadline value. If the task later calls sched_yield(), this inflated deadline can cause an overflow in vruntime calculations. This can corrupt scheduler data, potentially making all entities appear ineligible and leading to a system crash, resulting in a Denial of Service (DoS).

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.