Bug 2538015 (CVE-2026-94083) - CVE-2026-94083 suricata: suricata: type confusion and invalid free in DoH2 protocol handling
Summary: CVE-2026-94083 suricata: suricata: type confusion and invalid free in DoH2 pr...
Keywords:
Status: NEW
Alias: CVE-2026-94083
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2545210 2545211
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-22 16:36 UTC by OSIDB Bzimport
Modified: 2026-10-02 14:10 UTC (History)
0 users

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Description OSIDB Bzimport 2026-09-22 16:36:00 UTC 
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.
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