CVE-2025-59147 Suricata is Vulnerable to Detection Bypass via Crafted Multiple SYN Packets
Attackers can bypass Suricata's detection or cause flow blocking by sending crafted multiple SYN packets with varying sequence numbers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-59147?
CVE-2025-59147 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 7.0.11 and below, as well as 8.0.0, are vulnerable to detection bypass when crafted traffic sends multiple SYN packets with different sequence numbers within the same flow tuple, which can cause Suricata to fail to pick up the TCP session. In IDS mode this can lead to a detection and logging bypass. In IPS mode this will lead to the flow getting blocked. This issue is fixed in versions 7.0.12 and 8.0.1.
Weakness: CWE-358
Which versions are affected by CVE-2025-59147?
It affects 1 product.
Products include Oisf Suricata.
How do I fix CVE-2025-59147?
Upgrade to a fixed version.
Is CVE-2025-59147 being exploited?
There is no known exploitation of CVE-2025-59147 in the wild and no public exploit code.
Other vulnerabilities in Oisf Suricata
Sources
Also known as DEBIAN-CVE-2025-59147, GHSA-v8hv-6v7x-4c2r, UBUNTU-CVE-2025-59147.