What’s Vulnerable › Vulnerabilities

CVE-2026-74291: ASoC: topology: Check PCM and DAI name strings before use

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-30

Description

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 products

• Linux: 4.6 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/473f7d25d93e80db526a9d05887f0071abdc6d9b
• https://git.kernel.org/stable/c/5c2537cf24d673956b4e58029001667f89586fa2
• https://git.kernel.org/stable/c/b7e44d1986d6671342c19b82192189ca5db5dab7
• https://git.kernel.org/stable/c/ba37b62ed0a443b8e23f53a7477e7f2537fd34c7
• https://git.kernel.org/stable/c/c405b07246bf179e9457de57501c3470175b165e
• https://git.kernel.org/stable/c/d09dad8dff862c4b5aac48b1223e512074ffeb08

Get alerted when CVE-2026-74291 or the next vulnerability affects your stack