CVE-2026-5407 Details
Description
SMB2 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
A denial-of-service vulnerability has been identified in the SMB2 protocol dissector of Wireshark. This issue is present in Wireshark versions 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14. The vulnerability arises from the 'dissect_smb2_notify_data_out()' and 'dissect_smb2_file_full_ea_info()' functions, which can enter an infinite loop. This loop causes 'tshark' to use nearly 100% of CPU resources until the process is forcibly terminated. The issue can be triggered by a single TCP segment containing a crafted payload of just 104 bytes, without any user configuration required.
Users are advised to upgrade to Wireshark versions 4.6.5, 4.4.15 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 30, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gitlab.com/wireshark/wireshark/-/work_items/21073 | CISA-ADP | Issue TrackingThird Party Advisory |
| https://gitlab.com/wireshark/wireshark/-/issues/21073 | [email protected] | ExploitIssue Tracking |
| https://www.wireshark.org/security/wnpa-sec-2026-11.html | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-835 | Loop with Unreachable Exit Condition ('Infinite Loop') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wireshark wireshark | >= 4.4.0, <= 4.4.14 >= 4.6.0, <= 4.6.4 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 1, 2026 | Initial Analysis | [email protected] |
| Apr 30, 2026 | CVE Modified | CISA-ADP |
| Apr 30, 2026 | New CVE Received | [email protected] |