What is CVE-2023-5055?

CVE-2023-5055 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Stack-based Buffer Overflow. CVSS score: 8.3/10. Published 2023-11-21.

How severe is CVE-2023-5055?

High severity. CVSS v3 base score is 8.3 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2023-5055

Possible variant of CVE-2021-3434 in function le_ecred_reconf_req.

Vulnerability class: Buffer Overflow

Published 2023-11-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (54.1th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

References

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-wr8r-7f8x-24jj (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2023-5055?: CVE-2023-5055 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Stack-based Buffer Overflow. CVSS score: 8.3/10. Published 2023-11-21.
How severe is CVE-2023-5055?: High severity. CVSS v3 base score is 8.3 out of 10.