CVEvulnerability
CVE-2026-63448
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-09-18
- Last modified
- 2026-09-28
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-400, CWE-401, CWE-407
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 configurations
• oisf suricata (< 7.0.17)
• oisf suricata (>= 8.0.0 < 8.0.6)
Related
References
- https://github.com/OISF/suricata/commit/755d6c3061de4d7ba97f0ed31cdc17ab8cab4476 Patch
- https://github.com/OISF/suricata/commit/7ec9d72d28b9370712cf77a5b9d40d6b5db27cb4 Patch
- https://github.com/OISF/suricata/commit/88adab8bd3d62912941647ab65032d5ec75c893a Patch
- https://github.com/OISF/suricata/commit/9a54a043516e644bb7b9d34117a91977f950a281 Patch
- https://github.com/OISF/suricata/commit/bc39274a638d1cca2391cfa4891c8b6c255ff9ce Patch
- https://github.com/OISF/suricata/commit/c8f68b0e4f9e721dca1c9ed6e08597c6964c7ac3 Patch
- https://github.com/OISF/suricata/releases/tag/suricata-7.0.17 Release Notes
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6 Release Notes
- https://github.com/OISF/suricata/security/advisories/GHSA-hvvj-c8xx-9g35 Mitigation, Vendor Advisory
- https://redmine.openinfosecfoundation.org/issues/8629 Permissions Required