Bug 2420410 (CVE-2025-40344)

Summary: CVE-2025-40344 kernel: ASoC: Intel: avs: Disable periods-elapsed work when closing PCM
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A use-after-free vulnerability was found in the Intel AVS (Audio Voice Speech) sound driver in the Linux kernel. When closing a PCM stream, avs_dai_fe_shutdown() frees the DAI's private context while the period-elapsed work may still be servicing IRQs and accessing this context. This race condition can lead to use-after-free errors, potentially causing kernel crashes or memory corruption.
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Description OSIDB Bzimport 2025-12-09 05:01:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ASoC: Intel: avs: Disable periods-elapsed work when closing PCM

avs_dai_fe_shutdown() handles the shutdown procedure for HOST HDAudio
stream while period-elapsed work services its IRQs. As the former
frees the DAI's private context, these two operations shall be
synchronized to avoid slab-use-after-free or worse errors.
Comment 1 Alexander B 2025-12-09 14:24:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120912-CVE-2025-40344-0c59@gregkh/T