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.
Weakness
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.
References
- https://github.com/OISF/suricata/commit/3f86c56c800392ede5cfaf7a944a431fd8445c55
- https://github.com/OISF/suricata/commit/5af13e3eb06be0387da8703b611c5ce932245c59
- https://github.com/OISF/suricata/commit/bac8a69ca48c14582d39a244a87edad44751ebe1
- https://github.com/OISF/suricata/commit/ef035c7603293a10c5ad087e3d20b05f75236144
- https://github.com/OISF/suricata/pull/15740
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
Find the bug before an attacker does.
Sign in with GitHub and run your first audit in under a minute. The free plan needs no credit card.