Bug 2516884 (CVE-2026-74291)

Summary: CVE-2026-74291 kernel: ASoC: topology: Check PCM and DAI name strings before use
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's ASoC (Audio System on Chip) topology component. This vulnerability allows a local attacker to provide a specially crafted, malformed audio topology configuration (blob) with non-NUL-terminated name strings. This can cause the parser to read beyond the intended memory boundary, potentially leading to an out-of-bounds read and information disclosure.
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Description OSIDB Bzimport 2026-08-15 06:38:30 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ASoC: topology: Check PCM and DAI name strings before use

Topology objects store several PCM and DAI names in fixed-size UAPI
arrays. Other topology parser paths validate these fields with bounded
strnlen() checks before using them as C strings, but the PCM and DAI
paths still pass some fixed-size arrays directly to strlen(),
devm_kstrdup(), DAI lookup, and diagnostic prints.

A malformed topology blob with a non-NUL-terminated PCM, DAI, or stream
capability name can therefore make the parser read past the end of the
fixed-size field.

Reject unterminated PCM and DAI name fields before consuming them as C
strings.
Comment 1 Keith Grant 2026-08-20 14:55:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081548-CVE-2026-74291-9be4@gregkh/T