Resource exhaustion in Oisf Suricata
CVE-2026-57224
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the DHCP parser in rust/src/dhcp/dhcp.rs creates stateless transactions without recording their packet direction with AppLayerTxData::for_direction(), so a sensor that observes only one direction cannot mark the unseen direction inspected or free completed transactions. The RDP parser in rust/src/rdp/rdp.rs has the same direction-state defect. The per-flow transaction list can grow without bound and cleanup repeatedly scans it, causing increasing CPU and memory consumption and eventual denial of service. This issue is fixed in version 8.0.6.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Oisf Suricata — versions >= 8.0.0, < 8.0.6
Weakness classification (CWE)
References
- github.com/OISF/suricata/commit/3f86c56c800392ede5cfaf7a944a431fd8445c55 (Patch)
- github.com/OISF/suricata/commit/5af13e3eb06be0387da8703b611c5ce932245c59 (Patch)
- github.com/OISF/suricata/commit/bac8a69ca48c14582d39a244a87edad44751ebe1 (Patch)
- github.com/OISF/suricata/commit/ef035c7603293a10c5ad087e3d20b05f75236144 (Patch)
- github.com/OISF/suricata/pull/15740 (Patch)
- github.com/OISF/suricata/releases/tag/suricata-8.0.6 (Release Notes)
- github.com/OISF/suricata/security/advisories/GHSA-m2vc-g65c-ph7m (Mitigation, Vendor Advisory)
- redmine.openinfosecfoundation.org/issues/8621 (Permissions Required)
Frequently asked questions
- What is CVE-2026-57224?
- CVE-2026-57224 is a medium-severity vulnerability in Oisf Suricata, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-09-18.
- How severe is CVE-2026-57224?
- Medium severity. CVSS v3 base score is 6.5 out of 10.