Vulnerability · Published Apr 30, 2026 · Assigned by GitLab
CVE-2026-5655Use After Free in Wireshark
Medium 5.5
In plain English
A medium-severity use-after-free in Wireshark from Wireshark Foundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 89.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
SDP protocol dissector crash in Wireshark 4.6.0 to 4.6.4 allows denial of service
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | wireshark | 4.6.5-1 | DEBIAN-CVE-2026-5655 |
| Ubuntu:24.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-5655 |
| Ubuntu:25.10 | wireshark | no fix listed | UBUNTU-CVE-2026-5655 |
| Ubuntu:26.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-5655 |
| Ubuntu:26.10 | wireshark | no fix listed | UBUNTU-CVE-2026-5655 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wireshark Foundation | Wireshark | 4.6.0 – before 4.6.5 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://www.wireshark.org/security/wnpa-sec-2026-19.html
- GitLab Issue #21112 issue-tracking, permissions-required
- https://gitlab.com/wireshark/wireshark/-/work_items/21112 exploit