{"id":"CVE-2026-31931","aliases":["ALPINE-CVE-2026-31931","DEBIAN-CVE-2026-31931","EUVD-2026-18237","GHSA-gr22-4784-xvw3","UBUNTU-CVE-2026-31931","openSUSE-SU-2026:10443-1"],"status":"published","title":"Suricata tls: null dereference in tls.alpn rule keyword","description":"Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the \"tls.alpn\" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00365,"percentile":0.30714,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2026-03-27T00:00:00Z","modified":"2026-11-03T06:33:02Z","fixes":[{"ecosystem":"Alpine:v3.24","package":"suricata","fixed_in":["8.0.6-r0"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"suricata","fixed_in":["1:8.0.4-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.24","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.0.6-r0"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:8.0.4-1"}]}],"versions":["1:7.0.10-1","1:7.0.11-1","1:7.0.11-1~bpo13+1","1:8.0.0-1~exp1","1:8.0.0-1~exp2","1:8.0.0-1~exp4","1:8.0.0-1~exp5","1:8.0.1-1","1:8.0.1-2","1:8.0.1-3","1:8.0.1-3~bpo13+1","1:8.0.2-1","1:8.0.2-1~bpo13+1","1:8.0.3-1","1:8.0.3-1~bpo13+1","1:8.0.3-2~exp1","1:8.0.4-1~bpo13+1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.8-1build1","2.0.9-1","2.0.10-1","2.0.10-2","2.0.11-1","3.0-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2-2ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:6.0.4-2","1:6.0.4-3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:7.0.0-2","1:7.0.2-1","1:7.0.2-1build1","1:7.0.3-1build1","1:7.0.3-1build3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:7.0.8-2","1:7.0.10-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:8.0.3-1","1:8.0.5-1","1:8.0.6-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:7.0.10-1","1:8.0.1-3build1","1:8.0.2-1","1:8.0.2-1build1","1:8.0.3-1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0.4-1.1"}]}],"bundled":6}],"products":[{"vendor":"oisf","product":"suricata"}],"references":[{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-gr22-4784-xvw3","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory"]},{"url":"https://redmine.openinfosecfoundation.org/issues/8294","tags":["x_refsource_MISC","Issue Tracking","Permissions Required","web"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-31931","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31931.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31931","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-31931","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-31931","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31931","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-31931","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-31932","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-31933","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-31934","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-31935","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-31937","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-31931","title":"Suricata tls: null dereference in tls.alpn rule keyword","description":"Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the \"tls.alpn\" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.","status":"published","published":"2026-04-02T14:01:03.512Z","modified":"2026-04-02T14:18:27.902Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:19:51.277563Z"}],"euvd":[{"id":"EUVD-2026-18237","description":"Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the \"tls.alpn\" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.","status":"published","published":"2026-04-02T14:01:03Z","modified":"2026-04-02T14:18:27Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T19:25:23.121433Z"}],"nvd":[{"id":"CVE-2026-31931","description":"Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the \"tls.alpn\" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.","status":"published","published":"2026-04-02T14:16:28.587Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:12:12.73929Z"}],"osv":[{"id":"ALPINE-CVE-2026-31931","description":"Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the \"tls.alpn\" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.","status":"published","published":"2026-04-02T14:16:28.587Z","modified":"2026-11-03T06:33:02.254002408Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T07:15:53.944853Z"},{"id":"CVE-2026-31931","title":"Suricata tls: null dereference in tls.alpn rule keyword","description":"Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the \"tls.alpn\" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.","status":"published","published":"2026-04-02T14:01:03.512Z","modified":"2026-10-28T02:30:44.307761473Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:45:01.218144Z"},{"id":"DEBIAN-CVE-2026-31931","description":"Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the \"tls.alpn\" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.","status":"published","published":"2026-04-02T14:16:28.587Z","modified":"2026-10-27T09:47:33.695158381Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:54.232518Z"},{"id":"UBUNTU-CVE-2026-31931","description":"Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the \"tls.alpn\" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.","status":"published","published":"2026-04-02T14:16:00Z","modified":"2026-10-17T12:58:08.644250972Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:16.036833Z"},{"id":"openSUSE-SU-2026:10443-1","title":"libsuricata8_0_4-8.0.4-1.1 on GA media","description":"These are all security issues fixed in the libsuricata8_0_4-8.0.4-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-03-27T00:00:00Z","modified":"2026-03-28T08:46:01.918246Z","updated_at":"2026-11-02T16:58:38.415593Z"}]}}