CVE-2026-6521: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark Foundation Wireshark
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
AI Analysis
Technical Summary
This vulnerability in Wireshark's OpenFlow v5 protocol dissector causes an infinite loop due to a loop construct with an unreachable exit condition (CWE-835). Affected versions include 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. Exploitation results in denial of service by causing the Wireshark application to hang or become unresponsive when processing crafted OpenFlow v5 packets. The CVSS 3.1 base score is 5.5, reflecting medium severity with local attack vector, low complexity, no privileges required, user interaction needed, and impact limited to availability.
Potential Impact
Successful exploitation leads to denial of service by causing Wireshark to enter an infinite loop and become unresponsive. There is no impact on confidentiality or integrity. The attack requires local access and user interaction (opening a crafted capture file or packet). No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should avoid opening untrusted or suspicious OpenFlow v5 traffic captures. Monitor Wireshark updates for an official fix addressing this issue.
CVE-2026-6521: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') in Wireshark Foundation Wireshark
Description
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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Wireshark's OpenFlow v5 protocol dissector causes an infinite loop due to a loop construct with an unreachable exit condition (CWE-835). Affected versions include 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. Exploitation results in denial of service by causing the Wireshark application to hang or become unresponsive when processing crafted OpenFlow v5 packets. The CVSS 3.1 base score is 5.5, reflecting medium severity with local attack vector, low complexity, no privileges required, user interaction needed, and impact limited to availability.
Potential Impact
Successful exploitation leads to denial of service by causing Wireshark to enter an infinite loop and become unresponsive. There is no impact on confidentiality or integrity. The attack requires local access and user interaction (opening a crafted capture file or packet). No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should avoid opening untrusted or suspicious OpenFlow v5 traffic captures. Monitor Wireshark updates for an official fix addressing this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-04-17T15:05:17.772Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f2f4e9cbff5d8610970bb8
Added to database: 4/30/2026, 6:21:29 AM
Last enriched: 4/30/2026, 6:38:20 AM
Last updated: 5/1/2026, 12:13:37 AM
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.