CVE-2026-64144 Linux CVE debrief

Who should care

Linux kernel maintainers and users, Bluetooth component developers, and security teams monitoring Linux kernel vulnerabilities should be aware of this vulnerability. They should review the Linux kernel Bluetooth btmtk component code, verify the Linux kernel version, and apply patches if necessary. Additionally, they should monitor Linux kernel security advisories for further updates.

Technical summary

The CVE-2026-64144 vulnerability was found in the Linux kernel's Bluetooth btmtk component. It relates to the handling of urb (USB Request Block) setup packets in error conditions. When usb_submit_urb fails or the submitted urb is killed, the setup_packet is not freed, potentially leading to a memory leak. The fix adds freeing of the setup_packet in these error paths to prevent memory leaks. This issue is relevant to Linux kernel maintainers, Bluetooth component developers, and security teams.

Defensive priority

Medium priority for Linux kernel maintainers and developers working with Bluetooth components.

Recommended defensive actions

• Review Linux kernel Bluetooth btmtk component code for urb->setup_packet handling
• Verify Linux kernel version and apply patches if necessary
• Monitor Linux kernel security advisories for further updates
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

Evidence is limited; verify with primary records. The CVE record was published on 2026-07-19T16:17:56.347Z and has not been modified since then. The NVD entry is currently Received. To verify, defenders should check the official CVE record and NVD detail page for any updates. Additionally, reviewing the Linux kernel Bluetooth btmtk component code and verifying the Linux kernel version are recommended.

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.