PT-2025-46617 · Linux+2 · Linux Kernel+2
Published
2025-09-15
·
Updated
2026-03-13
·
CVE-2025-40142
CVSS v2.0
5.0
Medium
| Vector | AV:L/AC:H/Au:S/C:P/I:P/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a flaw in the ALSA PCM subsystem related to interrupt handling on PREEMPT RT systems. Specifically,
snd pcm group lock irq() acquires a spinlock, disabling interrupts but not softirqs. On PREEMPT RT kernels, softirqs are preemptible, potentially leading to a deadlock situation involving the softirq ctrl.lock and hrtimer cancel()/hrtimer run softirq() functions. The issue arises because a timer can be invoked during the spinlock operation on the same CPU, causing a lock dependency report. To prevent this potential deadlock, softirqs must be manually disabled before the lock is acquired on PREEMPT RT.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu