{"id":"UBUNTU-CVE-2026-11352","details":"An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client. Because the helper function discards zero-length UDP datagrams before counting them toward the per-call packet budget, a connected QUIC peer can continuously stream empty datagrams to indefinitely stall the client.","modified":"2026-07-11T00:15:10.227240711Z","published":"2026-06-24T14:00:00Z","related":["USN-8525-1"],"upstream":["CVE-2026-11352"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-11352"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-11352"},{"type":"REPORT","url":"https://curl.se/L7HzKXisfJ/CVE-2026-11352.md"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8525-1"}],"affected":[{"package":{"name":"curl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/curl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.18.0-1ubuntu2.3"}]}],"versions":["8.14.1-2ubuntu1","8.17.0-1ubuntu1","8.18.0-1ubuntu1","8.18.0-1ubuntu2","8.18.0-1ubuntu2.1","8.18.0-1ubuntu2.2"],"ecosystem_specific":{"binaries":[{"binary_name":"curl","binary_version":"8.18.0-1ubuntu2.3"},{"binary_version":"8.18.0-1ubuntu2.3","binary_name":"libcurl3t64-gnutls"},{"binary_name":"libcurl4t64","binary_version":"8.18.0-1ubuntu2.3"}],"availability":"No subscription required","priority_reason":"Upstream defined this as low severity"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-11352.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"},{"type":"Ubuntu","score":"low"}]}