Improper control of a resource through its lifetime in Linux kernel - CVE-2026-31733
Published: May 2, 2026
Vulnerability identifier: #VU128969
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-31733
CWE-ID: CWE-664
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper state management in sched_ext direct dispatch state handling when processing task wakeups and enqueue or dequeue paths. A local user can trigger task scheduling paths that leave stale direct dispatch state set to cause a denial of service.
The issue can trigger a spurious kernel warning when a subsequent wakeup causes ops.select_cpu() to call scx_bpf_dsq_insert().
How to mitigate CVE-2026-31733
Install security update from vendor's repository.