CVE-2026-99144
kernel: kernel: Denial of service via use-after-free in sched_ext
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 28, 2026
Updated · October 30, 2026
Description
A flaw was found in the Linux kernel's sched_ext (extensible scheduler) component. A race condition during the destruction of a user dispatch queue allows a deferred task re-enqueue operation to access memory that has already been freed. A local user can exploit this use-after-free vulnerability to cause a system crash, resulting in a Denial of Service (DoS).
CVSS score applicability
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.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.1CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-825 · Expired Pointer Dereference