{"id":"CVE-2025-53538","state":"PUBLISHED","title":"Suricata's mishandling of data on  HTTP2 stream 0 can lead to resource starvation","description":"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 -> 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.","publishedAt":"2025-07-22T21:36:03.976Z","updatedAt":"2025-07-23T18:32:21.856Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["OISF suricata"],"affected":[{"vendor":"OISF","product":"suricata","versions":[{"version":"< 7.0.11","status":"affected"},{"version":">= 8.0.0-beta1, < 8.0.0","status":"affected"}]}],"references":["https://github.com/OISF/suricata/security/advisories/GHSA-qrr7-crgj-cmh3","https://github.com/OISF/suricata/commit/1d6d331752e933c46aca0ae7a9679b27462246e3","https://github.com/OISF/suricata/commit/7fa88ea9e7d05e07a7864050cfd836b576669720"],"weaknesses":["CWE-770","CWE-400"],"ingestedAt":"2026-10-29T20:09:31.862Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/53xxx/CVE-2025-53538.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-53538","state":"PUBLISHED","datePublished":"2025-07-22T21:36:03.976Z","dateUpdated":"2025-07-23T18:32:21.856Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-07-02T15:15:11.515Z"},"containers":{"cna":{"title":"Suricata's mishandling of data on  HTTP2 stream 0 can lead to resource starvation","descriptions":[{"lang":"en","value":"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 -> 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."}],"affected":[{"vendor":"OISF","product":"suricata","versions":[{"version":"< 7.0.11","status":"affected"},{"version":">= 8.0.0-beta1, < 8.0.0","status":"affected"}]}],"references":[{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-qrr7-crgj-cmh3","name":"https://github.com/OISF/suricata/security/advisories/GHSA-qrr7-crgj-cmh3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/OISF/suricata/commit/1d6d331752e933c46aca0ae7a9679b27462246e3","name":"https://github.com/OISF/suricata/commit/1d6d331752e933c46aca0ae7a9679b27462246e3","tags":["x_refsource_MISC"]},{"url":"https://github.com/OISF/suricata/commit/7fa88ea9e7d05e07a7864050cfd836b576669720","name":"https://github.com/OISF/suricata/commit/7fa88ea9e7d05e07a7864050cfd836b576669720","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-07-22T21:36:03.976Z"},"source":{"advisory":"GHSA-qrr7-crgj-cmh3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-07-23T18:32:13.576494Z","id":"CVE-2025-53538","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-07-23T18:32:21.856Z"}}]}}}