Denial of Service in Wireshark Affected by SMB2 Protocol Dissector
CVE-2026-6867

5.5MEDIUM

Key Information:

Vendor

Wireshark
Status
Wireshark
Vendor
CVE Published:
30 April 2026

What is CVE-2026-6867?

The Wireshark application versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14 contain a vulnerability in the SMB2 protocol dissector that can lead to a crash of the application, resulting in a denial of service. Attackers can exploit this flaw to create network conditions that induce the application to terminate unexpectedly, affecting its availability.

Affected Version(s)

Wireshark 4.6.0 < 4.6.5

Wireshark 4.4.0 < 4.4.15

References

https://www.wireshark.org/security/wnpa-sec-2026-45.html
https://gitlab.com/wireshark/wireshark/-/work_items/21191

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

TODO
.