Description
Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state is executed even though the actual state is HTTP1 (when there is a DoH2 request with an HTTP1 to HTTP2 upgrade). This requires app-layer.protocols.doh2 to be enabled, which is the default in 8.x versions.
Published: 2026-09-20
Score: 9.4 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Sun, 20 Sep 2026 01:45:00 +0000

Type Values Removed Values Added
Description Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state is executed even though the actual state is HTTP1 (when there is a DoH2 request with an HTTP1 to HTTP2 upgrade). This requires app-layer.protocols.doh2 to be enabled, which is the default in 8.x versions.
First Time appeared Oisf
Oisf suricata
Weaknesses CWE-843
CPEs cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*
Vendors & Products Oisf
Oisf suricata
References
Metrics cvssV3_1

{'score': 9.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L'}

Subscriptions

Oisf Suricata
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-20T01:18:05.744Z

Reserved: 2026-09-20T01:18:05.348Z

Link: CVE-2026-94083

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-20T02:16:53.520

Modified: 2026-09-20T02:16:53.520

Link: CVE-2026-94083

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-843

    Access of Resource Using Incompatible Type ('Type Confusion')