{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/30531?format=json","vulnerability_id":"VCID-mt5t-ymhy-xuhp","summary":"h2 vulnerable to denial of service\nHyper is an HTTP library for Rust and h2 is an HTTP 2.0 client & server implementation for Rust. An issue was discovered in h2 v0.2.4 when processing header frames. It incorrectly processes the HTTP2 `RST_STREAM` frames by not always releasing the memory immediately upon receiving the reset frame, leading to stream stacking. As a result, the memory and CPU usage are high which can lead to a Denial of Service (DoS).\n\nThis issue affects users only when dealing with http2 connections.","aliases":[{"alias":"CVE-2023-26964"},{"alias":"GHSA-f8vr-r385-rh5r"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/581313?format=json","purl":"pkg:cargo/h2@0.3.17","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:cargo/h2@0.3.17"},{"url":"http://public2.vulnerablecode.io/api/packages/938655?format=json","purl":"pkg:deb/debian/rust-h2@0.3.13-2?distro=trixie","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-n66u-b73u-zucb"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/rust-h2@0.3.13-2%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/938658?format=json","purl":"pkg:deb/debian/rust-h2@0.4.7-3?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/rust-h2@0.4.7-3%3Fdistro=trixie"},{"url":"http://public2.vulnerablecode.io/api/packages/938656?format=json","purl":"pkg:deb/debian/rust-h2@0.4.13-1?distro=trixie","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/rust-h2@0.4.13-1%3Fdistro=trixie"}],"affected_packages":[],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2023-26964","reference_id":"","reference_type":"","scores":[{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.49008","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.48982","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.49029","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.49012","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.49016","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00256","scoring_system":"epss","scoring_elements":"0.48962","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00283","scoring_system":"epss","scoring_elements":"0.51751","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00283","scoring_system":"epss","scoring_elements":"0.51768","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00283","scoring_system":"epss","scoring_elements":"0.51735","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00283","scoring_system":"epss","scoring_elements":"0.51729","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00283","scoring_system":"epss","scoring_elements":"0.5178","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00283","scoring_system":"epss","scoring_elements":"0.51799","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00283","scoring_system":"epss","scoring_elements":"0.51792","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00329","scoring_system":"epss","scoring_elements":"0.55978","published_at":"2026-05-16T12:55:00Z"},{"value":"0.00329","scoring_system":"epss","scoring_elements":"0.55872","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00329","scoring_system":"epss","scoring_elements":"0.55818","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00329","scoring_system":"epss","scoring_elements":"0.55866","published_at":"2026-05-07T12:55:00Z"},{"value":"0.00329","scoring_system":"epss","scoring_elements":"0.55925","published_at":"2026-05-09T12:55:00Z"},{"value":"0.00329","scoring_system":"epss","scoring_elements":"0.55874","published_at":"2026-05-11T12:55:00Z"},{"value":"0.00329","scoring_system":"epss","scoring_elements":"0.559","published_at":"2026-05-12T12:55:00Z"},{"value":"0.00329","scoring_system":"epss","scoring_elements":"0.55959","published_at":"2026-05-14T12:55:00Z"},{"value":"0.00329","scoring_system":"epss","scoring_elements":"0.55974","published_at":"2026-05-15T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2023-26964"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"4.7","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://github.com/hyperium/h2/issues/621","reference_id":"","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/hyperium/h2/issues/621"},{"reference_url":"https://github.com/hyperium/h2/pull/668","reference_id":"","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/hyperium/h2/pull/668"},{"reference_url":"https://github.com/hyperium/hyper","reference_id":"","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/hyperium/hyper"},{"reference_url":"https://github.com/hyperium/hyper/issues/2877","reference_id":"","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-02-11T15:45:51Z/"}],"url":"https://github.com/hyperium/hyper/issues/2877"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26964","reference_id":"","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26964"},{"reference_url":"https://rustsec.org/advisories/RUSTSEC-2023-0034.html","reference_id":"","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://rustsec.org/advisories/RUSTSEC-2023-0034.html"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034723","reference_id":"1034723","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034723"},{"reference_url":"https://github.com/advisories/GHSA-f8vr-r385-rh5r","reference_id":"GHSA-f8vr-r385-rh5r","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-f8vr-r385-rh5r"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHBAE7LQARMPUEEV4TWET4D7G6WCWBUD/","reference_id":"ZHBAE7LQARMPUEEV4TWET4D7G6WCWBUD","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-02-11T15:45:51Z/"}],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHBAE7LQARMPUEEV4TWET4D7G6WCWBUD/"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZYRZ5Y2ALATKKPIITAFAJIS4TR4LUAHO/","reference_id":"ZYRZ5Y2ALATKKPIITAFAJIS4TR4LUAHO","reference_type":"","scores":[{"value":"7.5","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-02-11T15:45:51Z/"}],"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZYRZ5Y2ALATKKPIITAFAJIS4TR4LUAHO/"}],"weaknesses":[{"cwe_id":770,"name":"Allocation of Resources Without Limits or Throttling","description":"The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor."}],"exploits":[],"severity_range_score":"4.0 - 7.5","exploitability":null,"weighted_severity":null,"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-mt5t-ymhy-xuhp"}