CVE-2026-64238 Linux CVE debrief

Who should care

Linux kernel users and administrators should apply patches to prevent potential deadlocks in gpio shared proxy. This includes reviewing and updating Linux kernel versions to ensure the gpio shared proxy fix is applied. Security teams and vulnerability management teams should also review the issue and plan for mitigations if necessary.

Technical summary

The Linux kernel gpio shared proxy's parent removal has a potential deadlock vulnerability. The issue arises from a wide critical section in the gpio shared code that protects the offset field. To fix this, the critical section has been shortened to only protect the offset when it's being read. Patches are available to address this issue. Linux kernel users and administrators should verify their deployments and apply patches accordingly. The fix involves shortening the critical section to only protect the offset when it's being read, and additional review of Linux kernel versions and updates is recommended. Security teams should review the issue and plan for mitigations if necessary.

Defensive priority

Apply patches to prevent potential deadlocks in Linux kernel gpio shared proxy

Recommended defensive actions

• Apply patches to prevent potential deadlocks in Linux kernel gpio shared proxy
• Review and update Linux kernel versions to ensure gpio shared proxy fix is applied
• Monitor Linux kernel updates for additional security patches
• 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

Evidence from official CVE and NVD sources indicate a deadlock vulnerability in Linux kernel gpio shared proxy's parent removal. Patches are available to fix the issue. The fix involves shortening the critical section to only protect the offset when it's being read. Linux kernel users and administrators should verify their deployments and apply patches accordingly. The CVE record was published on 2026-07-24T16:16:53.090Z and has not been modified since then. The NVD entry is currently Analyzed. Additional review of Linux kernel versions and updates is recommended.

Official resources