CVE-2025-68764 Linux CVE debrief

Who should care

Users of Linux kernel who utilize NFS automounted filesystems should be aware of this vulnerability. This includes Linux kernel administrators, security teams, and operators responsible for maintaining and securing Linux-based systems, especially those using NFS automount features.

Technical summary

The Linux kernel has a vulnerability where NFS automounted filesystems do not properly inherit user-set superblock mount options, such as the 'ro' flag. This could potentially lead to security issues if not properly configured, allowing for unintended access or modifications. Affected users should review and apply patches from the Linux kernel maintainers. The vulnerability impacts Linux kernel deployments utilizing NFS automount features. Users should verify Linux kernel versions, NFS automount configurations, and applied patches. Additional verification tasks may be needed based on specific environment configurations and potential exposure. Linux kernel administrators, security teams, and operators should be aware of this vulnerability and take necessary actions to ensure proper configuration and security.

Defensive priority

Medium

Recommended defensive actions

• Review and update Linux kernel configurations to ensure NFS automounted filesystems inherit proper mount options.
• Verify and apply patches from the Linux kernel maintainers.
• Monitor Linux kernel updates for further fixes and enhancements.
• Perform vulnerability scanning to identify potentially exposed systems.
• 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 was published on 2026-01-05T10:15:57.587Z and has not been modified since then. The NVD entry is currently Deferred. Evidence is limited to CVE and NVD details. Defenders should verify Linux kernel versions, NFS automount configurations, and applied patches. Additional verification tasks may be needed based on specific environment configurations and potential exposure.

Official resources