CVE-2026-64471 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Bluetooth device manufacturers, and organizations using Linux-based systems with Bluetooth functionality should care about this vulnerability. They should review and apply the provided kernel patches, verify Linux kernel versions and Bluetooth configurations, and monitor system logs for potential errors. The vulnerability requires attention to ensure system stability and security.

Why it matters

A use-after-free vulnerability in the Linux kernel's Bluetooth btusb module requires attention from Linux kernel developers, Bluetooth device manufacturers, and organizations using Linux-based systems with Bluetooth functionality to ensure system stability and security.

• Potential system crashes or instability due to use-after-free errors
• Possible elevation of privileges or unauthorized access
• Required verification of Linux kernel versions and Bluetooth configurations
• Need for monitoring system logs for potential errors

Technical summary

The Linux kernel's Bluetooth btusb module has a use-after-free vulnerability. When controller registration fails, sibling interfaces are not released, potentially leading to use-after-free and double-free issues when they are eventually disconnected. The vulnerability affects Linux kernel versions and Bluetooth configurations. The fix involves reviewing and applying kernel patches, verifying Linux kernel versions and Bluetooth configurations, and monitoring system logs for potential errors. The vulnerability requires attention from Linux kernel developers, Bluetooth device manufacturers, and organizations using Linux-based systems with Bluetooth functionality

Defensive priority

Medium

Recommended defensive actions

• Review and apply the provided kernel patches to fix the vulnerability
• Verify the Linux kernel version and Bluetooth configuration to ensure the fix is applied
• Monitor system logs for potential use-after-free and double-free errors
• 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
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, the scope of affected systems and versions is not explicitly stated, requiring further verification. The vulnerability affects Linux kernel versions and Bluetooth configurations, and defenders should verify Linux kernel versions and Bluetooth configurations to ensure the fix is applied. The CVE record was published on 2026-07-25T10:17:32.510Z and has not been modified since then. The NVD entry provides additional information on the vulnerability. The Linux

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.