CVE-2026-90305
kernel: ARM: 9483/1: select HAVE_POSIX_CPU_TIMERS_TASK_WORK
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 14, 2026
Description
A flaw was found in the Linux kernel, specifically affecting ARM architectures with PREEMPT_RT enabled. A local attacker can trigger a Denial of Service (DoS) by utilizing CPU timers, such as through setrlimit or setitimer. This occurs because the kernel attempts to acquire a sleeping lock (sighand->siglock) from an invalid context when CPU timers expire in a hard interrupt request (IRQ) context, leading to a system crash.
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-663 · Use of a Non-reentrant Function in a Concurrent Context