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.
History

Thu, 24 Sep 2026 04:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sun, 20 Sep 2026 03:15:00 +0000

Type Values Removed Values Added
Title Suricata DoH2 Type Confusion Leads to Invalid Free

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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

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

Updated: 2026-09-22T15:20:03.227Z

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

Link: CVE-2026-94083

cve-icon Vulnrichment

Updated: 2026-09-22T15:19:59.809Z

cve-icon NVD

Status : Analyzed

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

Modified: 2026-09-28T18:30:00.563

Link: CVE-2026-94083

cve-icon Redhat

No data.