CVE-2026-95393 Heap-based Buffer Overflow in Wireshark

Medium 4.7 Published 29 Sep 2026 Updated 29 Sep 2026

A heap-based buffer overflow in the CSN.1 dissector allows attackers to cause a denial of service in Wireshark.

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-2026-95393?

CVE-2026-95393 is a medium-severity memory corruption vulnerability in Wireshark Wireshark, published on 29 Sep 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

CSN.1 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service

Weakness: CWE-122

Which versions are affected by CVE-2026-95393?

It affects 1 product.

Products include Wireshark Wireshark.

How do I fix CVE-2026-95393?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-95393 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-95393 exists.

All Wireshark Wireshark vulnerabilities

Sources

Also known as AZL-105039, DEBIAN-CVE-2026-95393, GHSA-jp3x-6949-38v9, MINI-536m-whg8-cv5v, UBUNTU-CVE-2026-95393.