What’s Vulnerable › Vulnerabilities

CVE-2026-6520: Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-30 · updated 2026-10-26
• Weakness: CWE-835

Description

OpenFlow v6 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

Affected products

• Wireshark Foundation Wireshark: from 4.4.0 through 4.4.14; from 4.6.0 through 4.6.4

References

• https://gitlab.com/wireshark/wireshark/-/work_items/21181
• https://www.wireshark.org/security/wnpa-sec-2026-40.html

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