{"id":"UBUNTU-CVE-2021-20286","details":"A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c may lead to denial of service.","modified":"2026-04-22T14:32:39.599703Z","published":"2021-03-15T18:15:00Z","upstream":["CVE-2021-20286"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-20286"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-20286"}],"affected":[{"package":{"name":"libnbd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libnbd@1.2.2-1ubuntu2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.3-1","1.2.1-2","1.2.2-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libnbd-ocaml","binary_version":"1.2.2-1ubuntu2"},{"binary_name":"libnbd0","binary_version":"1.2.2-1ubuntu2"},{"binary_name":"nbdfuse","binary_version":"1.2.2-1ubuntu2"},{"binary_name":"python3-libnbd","binary_version":"1.2.2-1ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20286.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}