CVE-2026-31937 Suricata dcerpc: quadratic complexity in dcerpc buffering

High 7.5 Published 2 Apr 2026 Updated 3 Apr 2026

Attackers can cause performance degradation in Suricata via inefficient DCERPC buffering, requiring an upgrade to mitigate.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-31937?

CVE-2026-31937 is a high-severity denial of service vulnerability in Oisf Suricata, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.

Weakness: CWE-407

Which versions are affected by CVE-2026-31937?

It affects 1 product.

Products include Oisf Suricata.

How do I fix CVE-2026-31937?

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-2026-31937 being exploited?

There is no known exploitation of CVE-2026-31937 in the wild and no public exploit code.

All Oisf Suricata vulnerabilities

Sources

Also known as DEBIAN-CVE-2026-31937, GHSA-86vg-w8vm-m3gg, UBUNTU-CVE-2026-31937.