#VU124469 Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-23371
Published: March 25, 2026
Vulnerability identifier: #VU124469
Vulnerability risk: Low
CVSSv4.0: 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-2026-23371
CWE-ID: CWE-703
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper state management in the deadline scheduler (sched/deadline) when handling priority inheritance (PI) de-boosting. A local user can manipulate scheduling parameters via sched_setscheduler() on a SCHED_DEADLINE task that holds a PI mutex, leading to missing ENQUEUE_REPLENISH flag and subsequent bandwidth accounting corruption, which may trigger a kernel warning and result in a denial of service.
Exploitation requires the ability to create and control SCHED_DEADLINE tasks and manipulate their scheduling policy while holding PI mutexes.
Remediation
Install security update from vendor's repository.