CVEvulnerability

CVE-2026-63446

7.5 HIGH Published 2026-09-18 Modified 2026-09-28 Official page ↗
Status
Analyzed
Published
2026-09-18
Last modified
2026-09-28
Assigner
[email protected]
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-401, CWE-407

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, AppLayerParserSetTransactionInspectId() in src/app-layer-parser.c uses an inverted guard and marks only already-inspected transactions as inspected. On flows passed by a pass rule or pass-the-flow exception policy, detection is skipped, so completed transactions remain unmarked, are never freed, and are repeatedly rescanned. The per-flow list can grow without bound with quadratic cleanup cost, causing CPU and memory exhaustion. This issue is fixed in version 8.0.6.

Affected configurations

• oisf suricata (>= 8.0.0 < 8.0.6)

Related

Weakness · CWE (2)

  • CWE-401 Missing Release of Memory after Effective Lifetime weakness
  • CWE-407 Inefficient Algorithmic Complexity weakness

References