VYPR
← All advisories
Unrated severityNVD Advisory· Published Dec 9, 2025· Updated Apr 15, 2026

CVE-2023-53815

CVE-2023-53815

Description

In the Linux kernel, the following vulnerability has been resolved:

posix-timers: Prevent RT livelock in itimer_delete()

itimer_delete() has a retry loop when the timer is concurrently expired. On non-RT kernels this just spin-waits until the timer callback has completed, except for posix CPU timers which have HAVE_POSIX_CPU_TIMERS_TASK_WORK enabled.

In that case and on RT kernels the existing task could live lock when preempting the task which does the timer delivery.

Replace spin_unlock() with an invocation of timer_wait_running() to handle it the same way as the other retry loops in the posix timer code.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

65

Patches

Vulnerability mechanics

References

6

News mentions

0

No linked articles in our index yet.