CVE-2026-64246 Linux CVE debrief

Who should care

Linux kernel maintainers, Linux distribution vendors, and users of Linux kernel versions 5.15 to 7.1.3 should review and apply patches to mitigate the vulnerability. Security teams and vulnerability management teams should prioritize patching and monitor Linux kernel updates for future security advisories.

Technical summary

The CVE-2026-64246 vulnerability is a use-after-free issue in the linkstation_poweroff_init() function of the Linux kernel. The flaw occurs due to the premature release of the node pointer, leading to potential local privilege escalation. The CVSS score is 7.8 (High). Affected Linux kernel versions range from 5.15 to 7.1.3. Linux kernel maintainers have addressed this issue with several patches available in the kernel stable branches.

Defensive priority

High priority due to potential local privilege escalation

Recommended defensive actions

• Apply patches from Linux kernel stable branches
• Review and update Linux kernel versions to ensure affected versions are patched
• Monitor Linux kernel updates for future security advisories
• 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 vulnerability details are based on the official CVE and NVD records. The Linux kernel maintainers have addressed this issue with several patches available in the kernel stable branches. Evidence is limited to public CVE and NVD records. Defenders should verify patch application and system exposure with Linux kernel maintainers and distribution vendors, and review Linux kernel versions to ensure affected versions are patched.

Official resources