CVE-2026-64206: Bluetooth: L2CAP: cancel pending_rx_work before taking conn->lock

mediumCVSS 5.5CVE-2026-64206

CSIRTS triage

What: A cancellation of pending work before taking a lock in Bluetooth L2CAP has been addressed.
Who is affected: No specific deployments or versions are mentioned.
Urgency: The urgency is medium with a CVSS score of 5.5.
Action: Apply the relevant patches for CVE-2026-64206.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64206

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-2026-642060.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64206	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownDSA-6405-1 linux - security updatedebian
medium[NEW] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
highCVE-2026-64206: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: cancel p…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.

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medium[UPDATE] [medium] Linux Kernel (Bluetooth): Multiple vulnerabilities allow Denial of Servicecert-bund · 2026-07-31
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mediumCVE-2026-17906: Insufficient validation of untrusted input in Bluetooth in Google Chrome prior to 151.0.7922.7…nvd · 2026-07-30
mediumCVE-2026-17737: Use after free in Bluetooth in Google Chrome on Android prior to 151.0.7922.72 allowed a remot…nvd · 2026-07-30