What is CVE-2023-6881?

CVE-2023-6881 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2024-02-29.

How severe is CVE-2023-6881?

High severity. CVSS v3 base score is 7.3 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2023-6881

Possible buffer overflow in is_mount_point

Vulnerability class: Buffer Overflow

Published 2024-02-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.

EPSS exploit prediction

EPSS: 0.004 (35.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-mh67-4h3q-p437 (Exploit, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-6881?: CVE-2023-6881 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.3/10. Published 2024-02-29.
How severe is CVE-2023-6881?: High severity. CVSS v3 base score is 7.3 out of 10.