CVE-2026-74291 Linux CVE debrief

Who should care

Linux kernel maintainers, system administrators, and users of Linux-based systems should verify and apply patches, review system configurations, and monitor system logs for suspicious activity. The vulnerability affects those who use Linux-based systems and have not applied the patch. Defenders should review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

A vulnerability in the Linux kernel's ASoC topology parser allows for out-of-bounds reads when handling malformed topology blobs with non-NUL-terminated PCM, DAI, or stream capability names. Defenders should verify and apply patches, review system configurations, and monitor system logs.

• Verify and apply patches to prevent potential out-of-bounds reads
• Review system configurations and topology blobs for potential vulnerabilities
• Monitor system logs for suspicious activity

Technical summary

The Linux kernel's ASoC topology parser does not properly validate PCM and DAI name strings before use, allowing for out-of-bounds reads when handling malformed topology blobs. This vulnerability has been resolved, but details on affected or fixed versions are not specified. Defenders should verify and apply patches to prevent potential out-of-bounds reads. The vulnerability affects Linux kernel maintainers, system administrators, and users of Linux-based systems. The parser does not perform bounded strnlen() checks before using PCM and DAI name strings as C strings.

Defensive priority

Verify and apply patches for Linux kernel ASoC topology parser vulnerability

Recommended defensive actions

• Verify Linux kernel version and apply patches if necessary
• Review system configurations and topology blobs for potential vulnerabilities
• Monitor system logs for suspicious activity
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but do not specify affected or fixed versions. Linux kernel maintainers have resolved the issue. The vulnerability allows for out-of-bounds reads when handling malformed topology blobs with non-NUL-terminated PCM, DAI, or stream capability names. Defenders should verify Linux kernel versions, review system configurations, and monitor system logs for suspicious activity.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.