What’s Vulnerable › Vulnerabilities

CVE-2023-2234: BT HCI host union variant confusion

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-07-10 · updated 2026-06-17
• Weakness: CWE-843

Description

Union variant confusion allows any malicious BT controller to execute arbitrary code on the Zephyr host.

Affected products

• zephyrproject zephyr: through 3.3.0

References

• https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx9g-8fr2-q899
• https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx9g-8fr2-q899

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