CVE-2025-29915 Suricata af-packet: defrag option can lead to truncated packets affecting visibility
Suricata's default AF_PACKET defrag setting causes truncated packets, reducing visibility and potentially allowing attackers to evade detection.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-29915?
CVE-2025-29915 is a high-severity denial of service vulnerability in Oisf Suricata, published on 10 Apr 2025. 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. The AF_PACKET defrag option is enabled by default and allows AF_PACKET to re-assemble fragmented packets before reaching Suricata. However the default packet size in Suricata is based on the network interface MTU which leads to Suricata seeing truncated packets. Upgrade to Suricata 7.0.9, which uses better defaults and adds warnings for user configurations that may lead to issues.
Weakness: CWE-347
Which versions are affected by CVE-2025-29915?
It affects 1 product.
Products include Oisf Suricata.
How do I fix CVE-2025-29915?
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-2025-29915 being exploited?
There is no known exploitation of CVE-2025-29915 in the wild and no public exploit code.
Other vulnerabilities in Oisf Suricata
Sources
Also known as DEBIAN-CVE-2025-29915, GHSA-7m5c-cqx4-x8mp, UBUNTU-CVE-2025-29915.