{"id":"CVE-2025-53538","summary":"Suricata's mishandling of data on  HTTP2 stream 0 can lead to resource starvation","details":"Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions 7.0.10 and below and  8.0.0-beta1 through 8.0.0-rc1, mishandling of data on HTTP2 stream 0 can lead to uncontrolled memory usage, leading to loss of visibility. Workarounds include disabling the HTTP/2 parser, and using a signature like drop http2 any any -\u003e any any (frame:http2.hdr; byte_test:1,=,0,3; byte_test:4,=,0,5; sid: 1;) where the first byte test tests the HTTP2 frame type DATA and the second tests the stream id 0. This is fixed in versions 7.0.11 and 8.0.0.","aliases":["GHSA-qrr7-crgj-cmh3"],"modified":"2026-04-10T05:30:53.043830Z","published":"2025-07-22T21:36:03.976Z","database_specific":{"cwe_ids":["CWE-400","CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53538.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53538.json"},{"type":"ADVISORY","url":"https://github.com/OISF/suricata/security/advisories/GHSA-qrr7-crgj-cmh3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53538"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/1d6d331752e933c46aca0ae7a9679b27462246e3"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/7fa88ea9e7d05e07a7864050cfd836b576669720"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/oisf/suricata","events":[{"introduced":"0"},{"fixed":"98b12d1c30e6f8db1e38f3c34abf965a4d03b062"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"7.0.11"}]}},{"type":"GIT","repo":"https://github.com/oisf/suricata","events":[{"introduced":"c965c5687db041492c19b7fbc3f72c4565427031"},{"fixed":"9956286fb89f9cad9e9f95b99dc751f8666617b7"}],"database_specific":{"versions":[{"introduced":"8.0.0-beta1"},{"fixed":"8.0.0"}]}}],"versions":["suricata-0.8.2","suricata-1.0.0","suricata-1.0.1","suricata-1.0.2","suricata-1.1","suricata-1.1beta1","suricata-1.1beta2","suricata-1.1beta3","suricata-1.1rc1","suricata-1.2","suricata-1.2.1","suricata-1.2beta1","suricata-1.2rc1","suricata-1.3","suricata-1.3.1","suricata-1.3beta1","suricata-1.3beta2","suricata-1.3rc1","suricata-1.4","suricata-1.4beta1","suricata-1.4beta2","suricata-1.4beta3","suricata-1.4rc1","suricata-2.0","suricata-2.0.1","suricata-2.0.1rc1","suricata-2.0.2","suricata-2.0beta1","suricata-2.0beta2","suricata-2.0rc1","suricata-2.0rc2","suricata-2.0rc3","suricata-2.1beta1","suricata-2.1beta2","suricata-2.1beta3","suricata-2.1beta4","suricata-3.0","suricata-3.0.1","suricata-3.0.1RC1","suricata-3.0RC1","suricata-3.0RC2","suricata-3.0RC3","suricata-3.1","suricata-3.1.1","suricata-3.1.2","suricata-3.1RC1","suricata-3.2","suricata-3.2.1","suricata-3.2RC1","suricata-3.2beta1","suricata-4.0.0","suricata-4.0.0-beta1","suricata-4.0.0-rc1","suricata-4.0.0-rc2","suricata-4.0.1","suricata-4.1.0","suricata-4.1.0-beta1","suricata-4.1.0-rc1","suricata-4.1.0-rc2","suricata-4.1.1","suricata-4.1.2","suricata-5.0.0","suricata-5.0.0-beta1","suricata-5.0.0-rc1","suricata-5.0.1","suricata-6.0.0","suricata-6.0.0-beta1","suricata-6.0.0-rc1","suricata-6.0.1","suricata-7.0.0","suricata-7.0.0-beta1","suricata-7.0.0-rc1","suricata-7.0.0-rc2","suricata-7.0.1","suricata-7.0.10","suricata-7.0.2","suricata-7.0.3","suricata-7.0.4","suricata-7.0.5","suricata-7.0.6","suricata-7.0.7","suricata-7.0.8","suricata-7.0.9","suricata-8.0.0-beta1","suricata-8.0.0-rc1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-53538.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}