CVE-2026-64471: Bluetooth: btusb: fix use-after-free on registration failure

highCVSS 7.1CVE-2026-64471

CSIRTS triage

vendor: Linux product: BluetoothOther

What: This vulnerability involves a use-after-free condition on registration failure.
Who is affected: Deployments using the Bluetooth subsystem.
Urgency: Remediation is necessary to prevent potential crashes or undefined behavior, though exploitation is not currently reported.
Action: Apply the patch for CVE-2026-64471.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.1
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64471

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-644710.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64471	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownCVE-2026-64471: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btusb: fix use-…nvd

Recent advisories for Bluetooth

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[UPDATE] [medium] Linux Kernel (Bluetooth): Multiple vulnerabilities allow Denial of Servicecert-bund · 2026-08-03
mediumCVE-2026-20495: In Bluetooth driver, there is a possible permission bypass due to a missing permission check. …nvd · 2026-08-03
lowCVE-2026-10774: Zephyr's Bluetooth Mesh subnet key management leaks one PSA Crypto key slot on every subnet-ke…nvd · 2026-08-02
mediumCVE-2026-2411: Zephyr's Bluetooth host declares a GATT characteristic as two consecutive attributes: a Charact…nvd · 2026-08-01
highCVE-2026-10685: The Zephyr Bluetooth GATT client CCC-write response handler gatt_write_ccc_rsp() in subsys/blu…nvd · 2026-07-31
mediumCVE-2026-17986: Insufficient policy enforcement in Bluetooth in Google Chrome prior to 151.0.7922.72 allowed a…nvd · 2026-07-30