What is CVE-2023-2855?

CVE-2023-2855 is a medium-severity vulnerability in Wireshark, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2023-05-26.

How severe is CVE-2023-2855?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Buffer overflow in Wireshark

CVE-2023-2855

Candump log parser crash in Wireshark 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows denial of service via crafted capture file

Vulnerability class: Buffer Overflow

Published 2023-05-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.016 (75.6th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Wireshark
Wireshark Foundation — versions >=4.0.0, <4.0.6, >=3.6.0, <3.6.14
Debian Linux — versions 12.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.wireshark.org/security/wnpa-sec-2023-12.html (Vendor Advisory)
gitlab.com/wireshark/wireshark/-/issues/19062 (Exploit, Patch, Third Party Advisory, Issue Tracking)
gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-2855.json (Third Party Advisory)
www.debian.org/security/2023/dsa-5429 (vendor-advisory, Third Party Advisory)
security.gentoo.org/glsa/202309-02 (vendor-advisory, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2023-2855?: CVE-2023-2855 is a medium-severity vulnerability in Wireshark, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2023-05-26.
How severe is CVE-2023-2855?: Medium severity. CVSS v3 base score is 5.3 out of 10.