Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, the SMB parser can retain force-completed transactions on flows where Suricata sees payload in only one direction, including async-oneside flows, because cleanup waits for inspection in the unseen direction. The transaction creation paths in rust/src/smb can exceed the intended SMB_MAX_TX bound, and cleanup repeatedly scans the growing list. Sustained one-directional SMB traffic can therefore cause unbounded per-flow state and CPU and memory exhaustion. This issue is fixed in versions 8.0.6 and 7.0.17.
Affected products
oisf: suricata
References10
- github.com/OISF/suricata/security/advisories/GHSA-hvvj-c8xx-9g35 MitigationVendor Advisory
- github.com/OISF/suricata/commit/755d6c3061de4d7ba97f0ed31cdc17a… Patch
- github.com/OISF/suricata/commit/7ec9d72d28b9370712cf77a5b9d40d6… Patch
- github.com/OISF/suricata/commit/88adab8bd3d62912941647ab65032d5… Patch
- github.com/OISF/suricata/commit/9a54a043516e644bb7b9d34117a9197… Patch
- github.com/OISF/suricata/commit/bc39274a638d1cca2391cfa4891c8b6… Patch
- github.com/OISF/suricata/commit/c8f68b0e4f9e721dca1c9ed6e08597c… Patch
- github.com/OISF/suricata/releases/tag/suricata-7.0.17 Release Notes
- github.com/OISF/suricata/releases/tag/suricata-8.0.6 Release Notes
- redmine.openinfosecfoundation.org/issues/8629 Permissions Required
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 39 · as of 8 November 2026
- CWE
- CWE-400CWE-401CWE-407
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.