CVE-2025-59148 Suricata's improper use of entropy keyword can lead to a NULL-ptr deref
Suricata crashes with a segmentation fault when processing rules with the entropy keyword not anchored to a sticky buffer, causing 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-2025-59148?
CVE-2025-59148 is a high-severity vulnerability in Oisf Suricata, published on 1 Oct 2025. 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 developed by the OISF (Open Information Security Foundation) and the Suricata community. Versions 8.0.0 and below incorrectly handle the entropy keyword when not anchored to a "sticky" buffer, which can lead to a segmentation fault. This issue is fixed in version 8.0.1. To workaround this issue, users can disable rules using the entropy keyword, or validate they are anchored to a sticky buffer.
Weakness: CWE-476
Which versions are affected by CVE-2025-59148?
It affects 1 product.
Products include Oisf Suricata.
How do I fix CVE-2025-59148?
Upgrade to a fixed version.
Is CVE-2025-59148 being exploited?
There is no known exploitation of CVE-2025-59148 in the wild and no public exploit code.
Other vulnerabilities in Oisf Suricata
Sources
Also known as GHSA-5qf6-92xg-3rr3, UBUNTU-CVE-2025-59148.