CVE-2026-64405: Bluetooth: hci_conn: Fix null ptr deref in hci_abort_conn()

highCVSS 7.1CVE-2026-64405

CSIRTS triage

vendor: Linux product: BluetoothOther

What: This vulnerability addresses a null pointer dereference in the hci_abort_conn function.
Who is affected: Deployments using the Bluetooth subsystem.
Urgency: Remediation is important to prevent potential crashes, although no exploitation has been reported.
Action: Apply the patch for CVE-2026-64405.

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-2026-64405

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-2026-644050.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64405	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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