How severe is CVE-2025-59147?

CVE-2025-59147 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2025-59147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59147?

CVE-2025-59147 primarily affects Oisf Suricata. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-59147?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-59147 have an EU (EUVD) identifier?

Yes. CVE-2025-59147 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33226.

When was CVE-2025-59147 published?

CVE-2025-59147 was published on 2025-10-01 and last updated on 2026-06-17.

CVE-2025-59147

CVE-2025-59147 is a high-severity vulnerability in Oisf Suricata with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-358.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-33226
Weakness: CWE-358
Affected product: Oisf Suricata
Published: 2025-10-01
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-59147?: CVE-2025-59147 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2025-59147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59147?: CVE-2025-59147 primarily affects Oisf Suricata. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-59147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-59147 have an EU (EUVD) identifier?: Yes. CVE-2025-59147 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33226.
When was CVE-2025-59147 published?: CVE-2025-59147 was published on 2025-10-01 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*
cpe:2.3:a:oisf:suricata:8.0.0:-:*:*:*:*:*:*
cpe:2.3:a:oisf:suricata:8.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:oisf:suricata:8.0.0:rc1:*:*:*:*:*:*

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