CVE-2026-6521

A flaw was found in Wireshark. The OpenFlow v5 protocol dissector contains an infinite loop vulnerability. A remote attacker could exploit this by sending a specially crafted packet, leading to a denial of service (DoS) condition, making the application unresponsive.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To reduce exposure, avoid analyzing untrusted network traffic or opening untrusted capture files with Wireshark. The OpenFlow v5 dissector can be disabled in Wireshark's protocol preferences to prevent the vulnerability from being triggered. This action may limit the ability to analyze OpenFlow v5 protocol traffic.