CVE-2026-3201 Improperly Controlled Sequential Memory Allocation in Wireshark

Medium 4.7 Published 25 Feb 2026 Updated 27 Mar 2026

Attackers can cause denial of service in Wireshark via memory exhaustion in the USB HID protocol dissector.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-3201?

CVE-2026-3201 is a medium-severity denial of service vulnerability in Wireshark Wireshark, published on 25 Feb 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

USB HID protocol dissector memory exhaustion in Wireshark 4.6.0 to 4.6.3 and 4.4.0 to 4.4.13 allows denial of service

Weakness: CWE-770, CWE-1325

Which versions are affected by CVE-2026-3201?

It affects 1 product.

Linux distribution packages (1)

wireshark openSUSE:Leap 15.6 All versions 4.2.14-150600.18.38.1

Products include Wireshark Wireshark.

How do I fix CVE-2026-3201?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-3201 being exploited?

There is no known exploitation of CVE-2026-3201 in the wild and no public exploit code.

All Wireshark Wireshark vulnerabilities

Sources

Also known as AZL-78336, DEBIAN-CVE-2026-3201, GHSA-3g96-v3mg-9xp9, SUSE-SU-2026:0810-1, UBUNTU-CVE-2026-3201.