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CVE-2026-53073: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error

highCVSS 7CVE-2026-53073

CSIRTS triage

Other
What
A high severity vulnerability related to Bluetooth has been identified.
Who is affected
Affected systems using Bluetooth may be vulnerable.
Urgency
Remediation is urgent due to the high severity of the vulnerability.
Action
Users should apply relevant patches or mitigations as they become available.

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-2026-53073

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-2026-53073coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

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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