Denial of Service in Wireshark SSH Dissector CVE-2026-15171 (4.6.0-4.6.6, 4.4.0-4.4.16)
CVE-2026-15171 Published on July 8, 2026
NULL Pointer Dereference in Wireshark
SSH protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service
Vulnerability Analysis
CVE-2026-15171 can be exploited with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2026-15171. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
NULL Pointer Dereference
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. NULL pointer dereference issues can occur through a number of flaws, including race conditions, and simple programming omissions.
Products Associated with CVE-2026-15171
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Affected Versions
Wireshark Foundation Wireshark:- Version 4.6.0 and below 4.6.7 is affected.
- Version 4.4.0 and below 4.4.17 is affected.