Paper/Archive/CVE-2026-94083

CVE-2026-94083

OISF Suricata — 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…

EPSS 0.5%CVSS 9.4

critical.is priorityof 100

CVSS 9.4 (CNA)9.4 / 10 × 3028.2 Not in CISA KEV+300.0 EPSS percentile 45.4.454 × 209.1 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Suricata8.0.0 – < 8.0.78.0.7CNA

Scores by source

mitre (CNA)9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refforum.suricata.io/t/suricata-8-0-7-released/6467 refgithub.com/OISF/suricata/commit/e574009add9c208f319e1d9d15b3bb1229c88074 refgithub.com/OISF/suricata/compare/suricata-8.0.6...suricata-8.0.7