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CVE-2026-53072: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER

highCVSS 7CVE-2026-53072

CSIRTS triage

Other
What
This vulnerability involves a locking issue in the Bluetooth subsystem.
Who is affected
Deployments using the affected Bluetooth subsystem.
Urgency
Remediation is high urgency due to the high severity rating.
Action
Apply the relevant patches to fix the locking issue.

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

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53072

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-53072coverage & exploitation statusNVD · CVE.org

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.

More from Microsoft Security Response Center