CVE-2026-6521

OpenFlow v5 protocol dissector infinite loops in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
Infinite Loop
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
GitLabCNA
5.5 MEDIUM
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
wiresharkwireshark
4.6.0 ≤
𝑥
< 4.6.5
CNA
wiresharkwireshark
4.4.0 ≤
𝑥
< 4.4.15
CNA
Common Weakness Enumeration
References
https://gitlab.com/wireshark/wireshark/-/work_items/21182
https://gitlab.com/wireshark/wireshark/-/work_items/21188
https://www.wireshark.org/security/wnpa-sec-2026-39.html