CVE-2026-15171 NULL Pointer Dereference in Wireshark
A NULL pointer dereference in the SSH dissector allows attackers to crash Wireshark, causing a denial of service.
- 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-2026-15171?
CVE-2026-15171 is a medium-severity vulnerability in Wireshark Wireshark, published on 8 Jul 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
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
Weakness: CWE-476
Which versions are affected by CVE-2026-15171?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2026-15171?
Upgrade to a fixed version.
Is CVE-2026-15171 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15171 exists.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as AZL-92126, DEBIAN-CVE-2026-15171, GHSA-gqgc-f2j4-fxx4, MINI-c2mf-wxx2-38xv, UBUNTU-CVE-2026-15171.