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CVE-2026-43022: Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists

unknownCVE-2026-43022

CSIRTS triage

vendor: Linuxproduct: Linux KernelOther
What
A return value error handling issue exists in hci_cmd_sync_queue_once() Bluetooth function.
Who is affected
Systems with Bluetooth HCI support in affected kernel versions.
Urgency
Unknown severity; insufficient information available for risk assessment.
Action
Await clarification on CVE-2026-43022 severity and impact before prioritizing patches.

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
unknown
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43022

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-2026-43022coverage & 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