{"id":"CVE-2026-94083","title":"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)","summary":"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). Thi…","severity":"critical","cvss":9.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","cwe":["CWE-843"],"vendor":"oisf","product":"suricata","affected":["suricata < 8.0.7"],"patched":["suricata 8.0.7"],"published":"2026-09-20","updated":"2026-09-28","sourceUpdated":"2026-09-28T18:30:00.563","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-94083","references":[{"url":"https://forum.suricata.io/t/suricata-8-0-7-released/6467","label":"cve@mitre.org"},{"url":"https://github.com/OISF/suricata/commit/e574009add9c208f319e1d9d15b3bb1229c88074","label":"cve@mitre.org"},{"url":"https://github.com/OISF/suricata/compare/suricata-8.0.6...suricata-8.0.7","label":"cve@mitre.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94083.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-94083"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-94083"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94083"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-09-22T15:19:55.907673Z"},"ingestedAt":"2026-09-20T02:12:35.982Z","epss":0.0054,"epssPercentile":0.45235,"scores":{"nvd":9.4,"vendor":9.8},"slug":"CVE-2026-94083","body":"## Overview\n\nSuricata 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.\n\n## Affected\n\n- `suricata < 8.0.7`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `suricata 8.0.7`\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-10-02 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94083.json)","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":51.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}