How severe is CVE-2025-64335?

CVE-2025-64335 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 none, and availability high.

Is CVE-2025-64335 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64335?

CVE-2025-64335 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64335?

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-2025-64335 have an EU (EUVD) identifier?

Yes. CVE-2025-64335 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199776.

When was CVE-2025-64335 published?

CVE-2025-64335 was published on 2025-11-26 and last updated on 2026-06-17.

CVE-2025-64335

CVE-2025-64335 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-199776
Weakness: CWE-476
Affected product: Oisf Suricata
Published: 2025-11-26
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. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.

Frequently asked questions

What is CVE-2025-64335?: Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.
How severe is CVE-2025-64335?: CVE-2025-64335 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 none, and availability high.
Is CVE-2025-64335 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64335?: CVE-2025-64335 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64335?: 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-2025-64335 have an EU (EUVD) identifier?: Yes. CVE-2025-64335 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199776.
When was CVE-2025-64335 published?: CVE-2025-64335 was published on 2025-11-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*

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