Use-After-Free Vulnerability in Suricata Network Engine
CVE-2026-22264

7.4HIGH

Key Information:

Vendor

Oisf

Status
Suricata
Vendor
CVE Published:
27 January 2026

What is CVE-2026-22264?

The Suricata network intrusion detection and prevention system is susceptible to an unsigned integer overflow, resulting in a use-after-free condition when it processes a high volume of alerts generated from a single packet. This vulnerability exists in versions prior to 8.0.3 and 7.0.14. Users are urged to upgrade to the latest versions or implement workarounds, such as avoiding untrusted rulesets and limiting the number of signatures configured to match packets to less than 65536. Failure to address this vulnerability could allow attackers to execute arbitrary code or cause service disruption.

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Affected Version(s)

suricata < 7.0.14 < 7.0.14

suricata >= 8.0.0, < 8.0.3 < 8.0.0, 8.0.3

References

https://github.com/OISF/suricata/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/OISF/suricata/commit/549d7bf60616de8e5...
x_refsource_MISC
https://github.com/OISF/suricata/commit/5789a3d3760dbf33d...
x_refsource_MISC

CVSS V3.1

Score:
7.4
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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