Improper control of a resource through its lifetime in Linux kernel - CVE-2026-43417
Published: May 8, 2026
Vulnerability identifier: #VU130769
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43417
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 the sched/mmcid logic when scheduling in a vfork() or CLONE_VM task. A local user can trigger the affected scheduling path to cause a denial of service.
The issue occurs when CID fixup does not correctly handle the task list and a subsequent schedule-in fails to acquire a transitional CID, causing the machine to stall.
How to mitigate CVE-2026-43417
Install security update from vendor's repository.