CVE-2026-74375 Linux CVE debrief

Who should care

Linux system administrators and users with md/raid1 or raid10 configurations should assess exposure and apply patches if necessary. This includes reviewing system configurations, monitoring system logs for potential deadlock issues, and ensuring that the necessary updates are applied to prevent system hangs or unresponsiveness. Security teams and vulnerability management teams should also prioritize patching to mitigate potential risks.

Why it matters

A deadlock vulnerability in the Linux kernel's md/raid1 and raid10 modules can lead to system hangs or unresponsiveness during read error recovery. Linux system administrators and users with affected configurations should assess exposure and apply patches.

• Potential system hang or unresponsiveness due to deadlock
• Read error recovery may not complete successfully
• System logs may indicate deadlock issues
• Verification of system configurations and md/raid1 and raid10 module updates is necessary

Technical summary

The Linux kernel's md/raid1 and raid10 modules have a deadlock vulnerability during read error recovery. A cloned bio resubmission can lead to a deadlock if the array is suspended. The issue is fixed in specific commits: ea2d1d2ebf60b70b602a92261a567d5fc4575eab, 38777f014c37972868f1733a651c85288bb8a757, and 7b15c24f805339a585cfe7d72f446b7e88b9bcc0. This fix prevents potential deadlocks during read error recovery, enhancing system stability and security. The vulnerability's resolution involves modifying the md/raid1 and raid10 modules to handle cloned bio resubmissions safely.

Defensive priority

Medium

Recommended defensive actions

• Review Linux kernel versions and apply patches if necessary
• Verify system configurations and update md/raid1 and raid10 modules
• Monitor system logs for potential deadlock issues
• 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
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide details on the vulnerability and its fix. The Linux kernel's md/raid1 and raid10 modules are affected. The issue is resolved in specific commits: ea2d1d2ebf60b70b602a92261a567d5fc4575eab, 38777f014c37972868f1733a651c85288bb8a757, and 7b15c24f805339a585cfe7d72f446b7e88b9bcc0.

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.