What is CVE-2023-0397?

CVE-2023-0397 is a critical-severity vulnerability in Zephyrproject Zephyr, classified under CWE-703. CVSS score: 9.6/10. Published 2023-01-19.

How severe is CVE-2023-0397?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Zephyrproject Zephyr

CVE-2023-0397

A malicious / defect bluetooth controller can cause a Denial of Service due to unchecked input in le_read_buffer_size_complete.

Published 2023-01-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.3th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% 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

Zephyrproject Zephyr
Zephyrproject-Rtos Zephyr — versions unspecified

Weakness classification (CWE)

References

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-wc2h-h868-q7hj (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-0397?: CVE-2023-0397 is a critical-severity vulnerability in Zephyrproject Zephyr, classified under CWE-703. CVSS score: 9.6/10. Published 2023-01-19.
How severe is CVE-2023-0397?: Critical severity. CVSS v3 base score is 9.6 out of 10.