CVE-2026-6528 Details
Description
TLS protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 allows denial of service
A denial-of-service vulnerability has been identified in Wireshark versions 4.6.0 through 4.6.4. The issue arises in the TLS protocol dissector, where the handling of the Encrypted Client Hello (ECH) can lead to an infinite loop. This occurs because the dissection process fails to properly manage certain extension types, causing Wireshark to consume 100% CPU indefinitely.
Users can upgrade to Wireshark version 4.6.5, where this vulnerability has been fixed.
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/21147 | [email protected] | ExploitIssue TrackingThird Party Advisory |
| https://gitlab.com/wireshark/wireshark/-/work_items/21151 | [email protected] | ExploitIssue Tracking |
| https://www.wireshark.org/security/wnpa-sec-2026-33.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 | >= 4.6.0, <= 4.6.4 |
CPE
Remediation
| |
Change History
4 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 | New CVE Received | [email protected] |