{"id":"USN-7892-1","summary":"h2o vulnerability","details":"It was discovered that H2O exhibited poor server resource management in its\nHTTP/2 protocol. An attacker could possibly use this issue to cause H2O to\ncrash, resulting in a denial of service.","modified":"2026-04-27T17:51:53.670308Z","published":"2025-11-26T13:24:12Z","related":["UBUNTU-CVE-2023-44487"],"upstream":["CVE-2023-44487","UBUNTU-CVE-2023-44487"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7892-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-44487"}],"affected":[{"package":{"name":"h2o","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/h2o@2.2.5+dfsg2-3ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.5+dfsg2-3ubuntu0.1~esm1"}]}],"versions":["2.2.5+dfsg2-3","2.2.5+dfsg2-3build1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"h2o","binary_version":"2.2.5+dfsg2-3ubuntu0.1~esm1"},{"binary_name":"libh2o-dev-common","binary_version":"2.2.5+dfsg2-3ubuntu0.1~esm1"},{"binary_name":"libh2o-evloop0.13","binary_version":"2.2.5+dfsg2-3ubuntu0.1~esm1"},{"binary_name":"libh2o0.13","binary_version":"2.2.5+dfsg2-3ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7892-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"high"}],"id":"CVE-2023-44487"}],"ecosystem":"Ubuntu:Pro:20.04:LTS"}}},{"package":{"name":"h2o","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/h2o@2.2.5+dfsg2-6.1ubuntu2+esm1?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.5+dfsg2-6.1ubuntu2+esm1"}]}],"versions":["2.2.5+dfsg2-6","2.2.5+dfsg2-6.1","2.2.5+dfsg2-6.1ubuntu1","2.2.5+dfsg2-6.1ubuntu2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"h2o","binary_version":"2.2.5+dfsg2-6.1ubuntu2+esm1"},{"binary_name":"libh2o-dev-common","binary_version":"2.2.5+dfsg2-6.1ubuntu2+esm1"},{"binary_name":"libh2o-evloop0.13","binary_version":"2.2.5+dfsg2-6.1ubuntu2+esm1"},{"binary_name":"libh2o0.13","binary_version":"2.2.5+dfsg2-6.1ubuntu2+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7892-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"high"}],"id":"CVE-2023-44487"}],"ecosystem":"Ubuntu:Pro:22.04:LTS"}}}],"schema_version":"1.7.5"}