CVE-2025-13945 Improperly Controlled Sequential Memory Allocation in Wireshark
A crash in the HTTP3 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-2025-13945?
CVE-2025-13945 is a medium-severity denial of service vulnerability in Wireshark Wireshark, published on 3 Dec 2025. 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
HTTP3 dissector crash in Wireshark 4.6.0 and 4.6.1 allows denial of service
Weakness: CWE-1325
Which versions are affected by CVE-2025-13945?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2025-13945?
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-2025-13945 being exploited?
There is no known exploitation of CVE-2025-13945 in the wild and no public exploit code.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as DEBIAN-CVE-2025-13945, GHSA-2q7x-94rj-f68w, UBUNTU-CVE-2025-13945.