Use After Free in Wireshark

CVE-2026-5655

SDP protocol dissector crash in Wireshark 4.6.0 to 4.6.4 allows denial of service

Vulnerability class: Use-After-Free

EPSS: 0.000 (6.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Wireshark
Wireshark Foundation — versions 4.6.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

cve@gitlab.com (Vendor Advisory)
GitLab Issue #21112 (issue-tracking, Exploit, permissions-required, Third Party Advisory, Issue Tracking)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Exploit, Issue Tracking, Third Party Advisory)

Frequently asked questions

What is CVE-2026-5655?: CVE-2026-5655 is a medium-severity vulnerability in Wireshark, classified under Use After Free. CVSS score: 5.5/10. Published 2026-04-30.
How severe is CVE-2026-5655?: Medium severity. CVSS v3 base score is 5.5 out of 10.