wnpa-sec-2026-45 · SMB2 protocol dissector crash
Summary
Name: SMB2 protocol dissector crash
Docid: wnpa-sec-2026-45
Date: April 29, 2026
Affected versions: 4.6.0 to 4.6.4, 4.4.0 to 4.4.14
Fixed versions: 4.6.5, 4.4.15
References:
Wireshark issue 21191.
CVE-2026-6867.
Details
Description
The SMB2 protocol dissector could crash.
Impact
Discovered by Alexandre de Oliveira. We are unaware of any exploits for this issue. It may be possible to make Wireshark crash or consume excessive resources by injecting a malformed packet onto the wire or by convincing someone to read a malformed packet trace file.
Resolution
Upgrade to Wireshark 4.6.5, 4.4.15 or later.
