Configuration in Linux kernel - CVE-2026-90305
Published: September 18, 2026
Vulnerability identifier: #VU151173
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-90305
CWE-ID: CWE-16
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper configuration in ARM CPU timer task-work configuration when CPU timers expire in hard interrupt context on PREEMPT_RT systems. A local user can configure a CPU resource limit and execute a busy loop to cause a denial of service.
CPU timers can also be triggered through ITIMER_PROF, ITIMER_VIRTUAL, and POSIX timers created with timer_create().
Affected software
Linux kernel
How to mitigate CVE-2026-90305
Install security update from vendor's repository.