CVE-2026-74291

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux64527e8a352968bda529f01df1c9dd5fe581ff04 < ba37b62ed0a443b8e23f53a7477e7f2537fd34c7affected
LinuxLinux64527e8a352968bda529f01df1c9dd5fe581ff04 < b7e44d1986d6671342c19b82192189ca5db5dab7affected
LinuxLinux4.6affected
LinuxLinux0 < 4.6unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References