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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-43459 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: soc-core: flush delayed work before removing DAIs and widgets When a sound card is unbound while a PCM stream is open, a use-after-free can occur in snd_soc_dapm_stream_event(), called from the close_delayed_work workqueue handler. During unbind, snd_soc_unbind_card() flushes delayed work and then calls soc_cleanup_card_resources(). Inside cleanup, snd_card_disconnect_sync() releases all PCM file descriptors, and the resulting PCM close path can call snd_soc_dapm_stream_stop() which schedules new delayed work with a pmdown_time timer delay. Since this happens after the flush in snd_soc_unbind_card(), the new work is not caught. soc_remove_link_components() then frees DAPM widgets before this work fires, leading to the use-after-free. The existing flush in soc_free_pcm_runtime() also cannot help as it runs after soc_remove_link_components() has already freed the widgets. Add a flush in soc_cleanup_card_resources() after snd_card_disconnect_sync() (after which no new PCM closes can schedule further delayed work) and before soc_remove_link_dais() and soc_remove_link_components() (which tear down the structures the delayed work accesses).


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/231568afbc0cd25b8fb2a94ebf9738eabe1cf007 kernel.org Patch 
https://git.kernel.org/stable/c/317a9298c54bb00319da73e5a7179f00e67fcbdf kernel.org Patch 
https://git.kernel.org/stable/c/3887e514978d28216246360b46a9cb534969eb5a kernel.org Patch 
https://git.kernel.org/stable/c/7d33e6140945482a07f8089ee86e13e02553ffdb kernel.org Patch 
https://git.kernel.org/stable/c/95bc5c225513fc3c4ce169563fb5e3929fbb938b kernel.org Patch 
https://git.kernel.org/stable/c/bf80a89da97285d9b877e0c6995e870d46b8025c kernel.org Patch 
https://git.kernel.org/stable/c/c054f0607c8bb1b1aa529bc109e4149298a1cccd kernel.org Patch 
https://git.kernel.org/stable/c/eab71e11ce2447c1e01809cbc11eab4234cf8dc8 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-43459
NVD Published Date:
05/08/2026
NVD Last Modified:
05/21/2026
Source:
kernel.org