Memory Consumption Vulnerability in Suricata Network Engine
CVE-2026-22259

7.5HIGH

Key Information:

Vendor

Oisf

Status
Suricata
Vendor
CVE Published:
27 January 2026

What is CVE-2026-22259?

Suricata, a robust network intrusion detection and prevention system, is susceptible to a memory consumption vulnerability due to its handling of specially crafted DNP3 traffic. This flaw, present in versions prior to 8.0.3 and 7.0.14, can lead to excessive memory usage, ultimately causing performance degradation and potential termination of the Suricata process by the Out of Memory (OOM) killer. Users are advised to upgrade to patched versions or disable the DNP3 parser in the configuration YAML to mitigate the risk.

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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/50cac2e2465ca211e...
x_refsource_MISC
https://github.com/OISF/suricata/commit/63225d5f8ef64cc65...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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