How severe is CVE-2025-64333?

CVE-2025-64333 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-2025-64333 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64333?

CVE-2025-64333 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64333?

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-2025-64333 have an EU (EUVD) identifier?

Yes. CVE-2025-64333 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199775.

When was CVE-2025-64333 published?

CVE-2025-64333 was published on 2025-11-26 and last updated on 2026-06-17.

CVE-2025-64333

CVE-2025-64333 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-199775
Weakness: CWE-787
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. Prior to versions 7.0.13 and 8.0.2, a large HTTP content type, when logged can cause a stack overflow crashing Suricata. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves limiting stream.reassembly.depth to less then half the stack size. Increasing the process stack size makes it less likely the bug will trigger.

Frequently asked questions

What is CVE-2025-64333?: Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, a large HTTP content type, when logged can cause a stack overflow crashing Suricata. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves limiting stream.reassembly.depth to less then half the stack size. Increasing the process stack size makes it less likely the bug will trigger.
How severe is CVE-2025-64333?: CVE-2025-64333 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-2025-64333 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64333?: CVE-2025-64333 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64333?: 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-2025-64333 have an EU (EUVD) identifier?: Yes. CVE-2025-64333 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199775.
When was CVE-2025-64333 published?: CVE-2025-64333 was published on 2025-11-26 and last updated on 2026-06-17.

References

https://github.com/OISF/suricata/security/advisories/GHSA-537h-xxmx-v87m

Affected products (1)

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

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