CVE-2025-59147: suricata — Fix

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-358 CWE-358

Affected Products

Vendor	Product	Versions
oisf	suricata	< 7.0.12
oisf	suricata	All
oisf	suricata	All
oisf	suricata	All

References

Advisories & Patches

https://github.com/OISF/suricata/commit/be6315dba0d9101b11d16e9dacfe2822b3792f1b https://github.com/OISF/suricata/commit/e91b03c90385db15e21cf1a0e85b921bf92b039e

Other References

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

Frequently Asked Questions

What is CVE-2025-59147? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-59147? +

CVE-2025-59147 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-59147? +

CVE-2025-59147 affects products from oisf, specifically: suricata. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-59147? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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