What is CVE-2023-2234?

CVE-2023-2234 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 6.8/10. Published 2023-07-10.

How severe is CVE-2023-2234?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Zephyrproject Zephyr

CVE-2023-2234

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

Published 2023-07-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (40.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx9g-8fr2-q899 (Not Applicable)

Frequently asked questions

What is CVE-2023-2234?: CVE-2023-2234 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 6.8/10. Published 2023-07-10.
How severe is CVE-2023-2234?: Medium severity. CVSS v3 base score is 6.8 out of 10.