CVE-2026-74293 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux-based systems using the fsl_audmix driver should be aware of this vulnerability. They should verify and apply patches, monitor system logs for potential exploitation attempts, and review system configurations for potential exposure. Additionally, security teams and operators managing Linux-based systems should be informed about the potential risks and take necessary

Why it matters

This vulnerability in the Linux kernel's fsl_audmix driver allows local attackers to potentially elevate privileges or crash the system by providing invalid enum values. Linux kernel developers, maintainers, and users of Linux-based systems using this driver should verify and apply patches, and monitor system logs for potential exploitation attempts.

• Local attackers may attempt to exploit this vulnerability to elevate privileges or crash the system.
• Successful exploitation could lead to denial of service or potential privilege escalation.
• Verification of applied patches and monitoring of system logs are necessary to detect potential exploitation attempts.
• Affected Linux kernel versions need to be updated to include the fix.

Technical summary

The fsl_audmix driver in the Linux kernel did not properly validate enum values provided by userspace. This could lead to out-of-range values being used, potentially causing a system crash or privilege escalation. The vulnerability exists due to missing validation in the fsl_audmix_put_mix_clk_src() and fsl_audmix_put_out_src() functions. These functions convert user-provided enum items without checking if they are within the valid range, leading to potential security issues. Linux kernel developers should review and apply patches to address this vulnerability.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the provided Linux kernel patches to ensure proper validation of enum values in the fsl_audmix driver.
• Verify that affected Linux kernel versions are updated to include the fix.
• Monitor system logs for potential exploitation attempts.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• 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.

Evidence notes

The CVE record and Linux kernel source code indicate a vulnerability in the fsl_audmix driver. Validation of enum values was missing, allowing potential out-of-range values to be used. The source code review and CVE details confirm that the vulnerability exists and that patching is required. Defenders should verify patch application and monitor system logs for potential exploitation attempts. Additional review of system configurations and compensating controls may be necessary.

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.