Bug 2426212 (CVE-2022-50866)

Summary: CVE-2022-50866 kernel: ASoC: pxa: fix null-pointer dereference in filter()
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 flaw was found in the Linux kernel ASoC pxa audio driver. The function filter() used kasprintf() to allocate a formatted string but did not check whether the allocation succeeded before passing the result to strcmp(). If memory allocation fails and kasprintf() returns NULL, this results in a NULL pointer dereference when calling strcmp(), which can trigger a kernel crash and denial of service.
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Description OSIDB Bzimport 2025-12-30 13:16:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ASoC: pxa: fix null-pointer dereference in filter()

kasprintf() would return NULL pointer when kmalloc() fail to allocate.
Need to check the return pointer before calling strcmp().
Comment 1 Alexander B 2025-12-31 01:04:06 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123049-CVE-2022-50866-6082@gregkh/T