Wireshark USB HID dissector DoS (Infinite Loop/Mem Leak) 4.6.0-4.6.8, 4.4.0-4.4.18
CVE-2026-96421 Published on September 29, 2026
Improperly Controlled Sequential Memory Allocation in Wireshark
USB HID protocol dissector infinite loop and memory leak in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service
Vulnerability Analysis
CVE-2026-96421 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-2026-96421. 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
What is a Stack Exhaustion Vulnerability?
The product manages a group of objects or resources and performs a separate memory allocation for each object, but it does not properly limit the total amount of memory that is consumed by all of the combined objects.
CVE-2026-96421 has been classified to as a Stack Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-96421
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Affected Versions
Wireshark Foundation Wireshark:- Version 4.6.0 and below 4.6.9 is affected.
- Version 4.4.0 and below 4.4.19 is affected.