{"id":"UBUNTU-CVE-2026-80229","details":"When performing transfers via libcurl’s multi interface, pooled TLS connections can outlive their originating easy handles. In OpenSSL 3 provider configurations, libcurl attaches an allocated library context to the easy handle's state and passes it to OpenSSL without acquiring an ownership reference; destroying the easy handle prematurely frees this context while the active connection retains a dangling pointer, leading to a heap-use-after-free upon subsequent I/O or post-handshake operations.","modified":"2026-09-16T11:41:47Z","published":"2026-09-06T18:17:00Z","upstream":["CVE-2026-80229"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-80229"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-80229"},{"type":"REPORT","url":"https://curl.se/docs/CVE-2026-80229.html"},{"type":"REPORT","url":"https://github.com/curl/curl/commit/7ea37abc6ac0120ba5f6d9"}],"affected":[{"package":{"name":"curl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/curl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_version":"8.18.0-1ubuntu2.5","binary_name":"curl"},{"binary_version":"8.18.0-1ubuntu2.5","binary_name":"libcurl3t64-gnutls"},{"binary_name":"libcurl4t64","binary_version":"8.18.0-1ubuntu2.5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-80229.json"}}],"schema_version":"1.9.0","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":"medium"}]}