CVE-2026-9759 NULL Pointer Dereference in Wireshark
A NULL pointer dereference in the ROHC 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-2026-9759?
CVE-2026-9759 is a medium-severity vulnerability in Wireshark Wireshark, published on 27 May 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
ROHC protocol dissector crash in Wireshark 4.6.0 to 4.6.5 and 4.4.0 to 4.4.15 allows denial of service
Weakness: CWE-476
Which versions are affected by CVE-2026-9759?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2026-9759?
Upgrade to a fixed version.
Is CVE-2026-9759 being exploited?
There is no known exploitation of CVE-2026-9759 in the wild and no public exploit code.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as AZL-88805, CLSA-2026-1783432450, CLSA-2026-1783434011, DEBIAN-CVE-2026-9759, GHSA-q2f9-8cg7-wv42, OESA-2026-2481 and 5 more.