What is CVE-2023-0667?

CVE-2023-0667 is a medium-severity vulnerability in Wireshark, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2023-06-07.

How severe is CVE-2023-0667?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Wireshark

CVE-2023-0667

Due to failure in validating the length provided by an attacker-crafted MSMMS packet, Wireshark version 4.0.5 and prior, in an unusual configuration, is susceptible to a heap-based buffer overflow, and possibly code execution in the context of the process running Wireshark

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.020 (80.1th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Wireshark
Wireshark Foundation — versions 0, 4.0.6, 3.6.14

Weakness classification (CWE)

References

takeonme.org/cves/CVE-2023-0667.html (Exploit, Third Party Advisory, third-party-advisory)
gitlab.com/wireshark/wireshark/-/issues/19086 (issue-tracking, Exploit, Issue Tracking)
security.gentoo.org/glsa/202309-02 (Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2023-0667?: CVE-2023-0667 is a medium-severity vulnerability in Wireshark, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2023-06-07.
How severe is CVE-2023-0667?: Medium severity. CVSS v3 base score is 6.5 out of 10.