How severe is CVE-2026-22264?

CVE-2026-22264 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-22264 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-2026-22264?

CVE-2026-22264 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22264?

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-2026-22264 have an EU (EUVD) identifier?

Yes. CVE-2026-22264 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4782.

When was CVE-2026-22264 published?

CVE-2026-22264 was published on 2026-01-27 and last updated on 2026-06-17.

CVE-2026-22264

CVE-2026-22264 is a high-severity vulnerability in Oisf Suricata with a CVSS 3.x base score of 7.4. 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-416.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4782
Weakness: CWE-416
Affected product: Oisf Suricata
Published: 2026-01-27
Last modified: 2026-06-17

Description

Suricata is a network IDS, IPS and NSM engine. Prior to version 8.0.3 and 7.0.14, an unsigned integer overflow can lead to a heap use-after-free condition when generating excessive amounts of alerts for a single packet. Versions 8.0.3 and 7.0.14 contain a patch. As a workaround, do not run untrusted rulesets or run with less than 65536 signatures that can match on the same packet.

Frequently asked questions

What is CVE-2026-22264?: Suricata is a network IDS, IPS and NSM engine. Prior to version 8.0.3 and 7.0.14, an unsigned integer overflow can lead to a heap use-after-free condition when generating excessive amounts of alerts for a single packet. Versions 8.0.3 and 7.0.14 contain a patch. As a workaround, do not run untrusted rulesets or run with less than 65536 signatures that can match on the same packet.
How severe is CVE-2026-22264?: CVE-2026-22264 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-22264 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-2026-22264?: CVE-2026-22264 affects Oisf Suricata. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22264?: 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-2026-22264 have an EU (EUVD) identifier?: Yes. CVE-2026-22264 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4782.
When was CVE-2026-22264 published?: CVE-2026-22264 was published on 2026-01-27 and last updated on 2026-06-17.

References

Affected products (1)

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

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