CVE-2026-6868 Details
Description
HTTP 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 Wireshark versions 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14. The issue arises in the HTTP protocol dissector, which can crash when handling certain packets. This crash is triggered by a stack buffer overflow, caused by the HTTP dissector being called through an X.25 conversation path, rather than the expected TCP path. As a result, the dissector accesses invalid, uninitialized memory, leading to a buffer overflow and application crash.
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/21185 | [email protected] | ExploitVendor Advisory |
| https://www.wireshark.org/security/wnpa-sec-2026-46.html | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wireshark wireshark | >= 4.4.0, < 4.4.15 >= 4.6.0, < 4.6.5 |
CPE
Remediation
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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] |