CVE-2026-46352 Suricata defrag: fragmented encapsulated traffic with fragments can lead to deadlock
Attackers can cause a deadlock in Suricata by sending fragmented encapsulated traffic, leading to a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46352?
CVE-2026-46352 is a high-severity denial of service vulnerability in Oisf Suricata, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, Suricata's IP defragmentation code could deadlock when processing fragmented traffic containing an encapsulated tunnel protocol whose payload is itself fragmented. Version 8.0.5 contains a fix. No known workarounds are available.
Weakness: CWE-833
Which versions are affected by CVE-2026-46352?
It affects 1 product.
Products include Oisf Suricata.
How do I fix CVE-2026-46352?
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-2026-46352 being exploited?
There is no known exploitation of CVE-2026-46352 in the wild and no public exploit code.
Other vulnerabilities in Oisf Suricata
Sources
Also known as DEBIAN-CVE-2026-46352, GHSA-rc34-46x6-mxxm, UBUNTU-CVE-2026-46352.