CVE-2023-2234 — Union variant confusion allows any malicious BT controller to execute arbitrary

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

01What is this vulnerability?

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

02Affected products

Vendor	Product	Versions
zephyrproject-rtos	Zephyr	*

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-07-10T04:33:35.254Z
• Last modified: 2024-11-07T15:20:13.942Z

09References

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