{"id":"UBUNTU-CVE-2026-107929","details":"When `CURLOPT_INTERFACE` (or the command line tool's `--interface` option) is set with one of the documented prefixes (`if!`, `host!`, `ifhost!`), that binding is not part of the connection reuse key, so a later transfer asking for a different source can silently reuse an existing connection and go out from the earlier transfer's source address.","modified":"2026-10-17T12:58:02.465688531Z","published":"2026-10-14T06:00:00Z","related":["USN-8927-1"],"upstream":["CVE-2026-107929"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-107929"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-107929"},{"type":"REPORT","url":"https://curl.se/docs/CVE-2026-107929.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8927-1"}],"affected":[{"package":{"name":"curl","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/curl?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.18.0-1ubuntu2","8.20.0-2ubuntu1","8.20.0-2ubuntu3","8.20.0-2ubuntu10","8.20.0-2ubuntu11"],"ecosystem_specific":{"binaries":[{"binary_name":"curl","binary_version":"8.20.0-2ubuntu11"},{"binary_name":"libcurl3t64-gnutls","binary_version":"8.20.0-2ubuntu11"},{"binary_name":"libcurl4t64","binary_version":"8.20.0-2ubuntu11"}],"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-2026-107929.json"}},{"package":{"name":"curl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/curl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.18.0-1ubuntu2.8"}]}],"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","8.18.0-1ubuntu2.3","8.18.0-1ubuntu2.4","8.18.0-1ubuntu2.5","8.18.0-1ubuntu2.7"],"ecosystem_specific":{"binaries":[{"binary_name":"curl","binary_version":"8.18.0-1ubuntu2.8"},{"binary_name":"libcurl3t64-gnutls","binary_version":"8.18.0-1ubuntu2.8"},{"binary_name":"libcurl4t64","binary_version":"8.18.0-1ubuntu2.8"}],"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-2026-107929.json"}}],"schema_version":"1.9.0","severity":[{"type":"Ubuntu","score":"low"}]}