Vulnerability · Published Apr 30, 2026 · Assigned by GitLab
CVE-2026-6536Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark
Medium 5.5
In plain English
A medium-severity infinite loop 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 8% 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 92.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
DLMS/COSEM protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | wireshark | 4.6.5-1 | DEBIAN-CVE-2026-6536 |
| Ubuntu:24.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-6536 |
| Ubuntu:25.10 | wireshark | no fix listed | UBUNTU-CVE-2026-6536 |
| Ubuntu:26.04:LTS | wireshark | no fix listed | UBUNTU-CVE-2026-6536 |
| Ubuntu:26.10 | wireshark | no fix listed | UBUNTU-CVE-2026-6536 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Wireshark Foundation | Wireshark | 4.6.0 – before 4.6.5 |
Weakness: CWE-835 · 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-2026-25.html
- GitLab Issue #21065 issue-tracking, permissions-required
- https://gitlab.com/wireshark/wireshark/-/work_items/21065 exploit