CVE-2026-76879: Stack-based Buffer Overflow in Wireshark
Published Aug 19, 2026
·Updated
C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Affected Software
1 affected component
Wireshark Wireshark>=4.6.0<=4.6.7, >=4.4.0<=4.4.18
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 4.6.8
Event History
Aug 19, 2026
CVE Published
via MITRE·10:44 PM
Data Sourced
via MITRE·10:44 PM
RemedyDescriptionSeverityWeakness
Frequently Asked Questions
1
Which Wireshark releases are affected?
Affected releases are Wireshark 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18.
2
What does an attacker need to exploit this issue?
The issue is network-reachable and requires no privileges or user interaction. Exploitation involves traffic that reaches Wireshark's C12.22 protocol dissector.
3
What is the impact of successful exploitation?
Successful exploitation can crash Wireshark, resulting in denial of service. The provided data does not indicate confidentiality or integrity impact.