Resource exhaustion in Oisf Suricata
CVE-2026-22259
Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, specially crafted traffic can cause Suricata to consume large amounts of memory while parsing DNP3 traffic. This can lead to the process slowing down and running out of memory, potentially leading to it getting killed by the OOM killer. Versions 8.0.3 or 7.0.14 contain a patch. As a workaround, disable the DNP3 parser in the suricata yaml (disabled by default).
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001
Affected products
- Oisf Suricata — versions < 7.0.14, >= 8.0.0, < 8.0.3
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-878h-2x6v-84q9 (Patch, Vendor Advisory)
- github.com/OISF/suricata/commit/50cac2e2465ca211eabfa156623e585e9037bb7e (Patch)
- github.com/OISF/suricata/commit/63225d5f8ef64cc65164c0bb1800730842d54942 (Patch)
- redmine.openinfosecfoundation.org/issues/8181 (Permissions Required, Issue Tracking)
Frequently asked questions
- What is CVE-2026-22259?
- CVE-2026-22259 is a high-severity vulnerability in Oisf Suricata, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-01-27.
- How severe is CVE-2026-22259?
- High severity. CVSS v3 base score is 7.5 out of 10.