CVE-2026-5406 Details
Description
FC-SWILS protocol dissector crash 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 FC-SWILS protocol dissector of Wireshark. This issue is present in Wireshark versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. The vulnerability arises from a stack overflow in the 'dissect_swils_zone_obj()' function, which processes zone set objects by recursively calling itself for each member. The lack of a recursion depth guard allows a crafted packet to create excessive nesting, leading to a crash. This issue can be reproduced in 'tshark' with the '-V' flag, but not in the Wireshark GUI without additional user interaction.
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
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gitlab.com/wireshark/wireshark/-/work_items/21070 | CISA-ADP | Issue TrackingThird Party Advisory |
| https://gitlab.com/wireshark/wireshark/-/issues/21070 | [email protected] | ExploitIssue Tracking |
| https://www.wireshark.org/security/wnpa-sec-2026-10.html | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-674 | Uncontrolled Recursion | [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] |