{"schema_version":"1.7.3","id":"USN-4923-1","published":"2021-04-20T17:08:41Z","modified":"2026-02-10T04:42:09Z","related":["UBUNTU-CVE-2021-28210","UBUNTU-CVE-2021-28211"],"upstream":["CVE-2021-28210","CVE-2021-28211","UBUNTU-CVE-2021-28210","UBUNTU-CVE-2021-28211"],"summary":"edk2 vulnerabilities","details":"Laszlo Ersek discovered that EDK II incorrectly handled recursion. A\nremote attacker could possibly use this issue to cause EDK II to consume\nresources, leading to a denial of service. (CVE-2021-28210)\n\nSatoshi Tanda discovered that EDK II incorrectly handled decompressing\ncertain images. A remote attacker could use this issue to cause EDK II to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2021-28211)\n","affected":[{"package":{"name":"edk2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/edk2@0~20191122.bd85bf54-2ubuntu3.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0~20191122.bd85bf54-2ubuntu3.2"}]}],"versions":["0~20190606.20d2e5a1-2ubuntu1","0~20190828.37eef910-3","0~20190828.37eef910-4","0~20191122.bd85bf54-1","0~20191122.bd85bf54-1ubuntu1","0~20191122.bd85bf54-2","0~20191122.bd85bf54-2ubuntu1","0~20191122.bd85bf54-2ubuntu2","0~20191122.bd85bf54-2ubuntu3","0~20191122.bd85bf54-2ubuntu3.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"ovmf","binary_version":"0~20191122.bd85bf54-2ubuntu3.2"},{"binary_name":"qemu-efi","binary_version":"0~20191122.bd85bf54-2ubuntu3.2"},{"binary_name":"qemu-efi-aarch64","binary_version":"0~20191122.bd85bf54-2ubuntu3.2"},{"binary_name":"qemu-efi-arm","binary_version":"0~20191122.bd85bf54-2ubuntu3.2"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2021-28210","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2021-28211","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4923-1.json"}}],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4923-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28210"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28211"}]}