CVE-2026-90432

A flaw was found in the Linux kernel's sched_ext component, specifically within its hardlockup handler. An unnecessary deferral of abort operations could prevent the system from properly recovering from a CPU hardlockup, where a CPU becomes unresponsive. This could lead to system unresponsiveness or a denial of service (DoS) condition, particularly in self-detected hardlockup scenarios. The fix ensures that hardlockups are handled directly, improving system stability and recoverability.

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.