{"id":"UBUNTU-CVE-2021-4021","details":"A vulnerability was found in Radare2 in versions prior to 5.6.2, 5.6.0, 5.5.4 and 5.5.2. Mapping a huge section filled with zeros of an ELF64 binary for MIPS architecture can lead to uncontrolled resource consumption and DoS.","modified":"2026-05-20T16:05:12.515033121Z","published":"2022-02-24T19:15:00Z","upstream":["CVE-2021-4021"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-4021"},{"type":"REPORT","url":"https://github.com/radareorg/radare2/issues/19436"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-4021"}],"affected":[{"package":{"name":"radare2","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/radare2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.6-3.1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.6-3.1ubuntu1","binary_name":"libradare2-0.9.6"},{"binary_name":"libradare2-common","binary_version":"0.9.6-3.1ubuntu1"},{"binary_version":"0.9.6-3.1ubuntu1","binary_name":"radare2"},{"binary_name":"radare2-plugins","binary_version":"0.9.6-3.1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4021.json"}},{"package":{"name":"radare2","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/radare2?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.0+dfsg-1","2.0.0+dfsg-1","2.1.0+dfsg-1","2.3.0+dfsg-1","2.3.0+dfsg-2","2.3.0+dfsg-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.0+dfsg-2ubuntu0.1~esm1","binary_name":"libradare2-2.3"},{"binary_name":"libradare2-common","binary_version":"2.3.0+dfsg-2ubuntu0.1~esm1"},{"binary_version":"2.3.0+dfsg-2ubuntu0.1~esm1","binary_name":"radare2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4021.json"}},{"package":{"name":"radare2","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/radare2?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.1+dfsg-5build1","4.0.0+dfsg-1","4.2.1+dfsg-1","4.2.1+dfsg-2","4.2.1+dfsg-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.2.1+dfsg-2ubuntu0.1~esm1","binary_name":"libradare2-4.2.1"},{"binary_name":"libradare2-common","binary_version":"4.2.1+dfsg-2ubuntu0.1~esm1"},{"binary_name":"radare2","binary_version":"4.2.1+dfsg-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4021.json"}},{"package":{"name":"radare2","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/radare2?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.5.0+dfsg-1ubuntu1","5.5.0+dfsg-1.1ubuntu2","5.5.0+dfsg-1.1ubuntu3","5.5.0+dfsg-1.1ubuntu3+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libradare2-5.0.0t64","binary_version":"5.5.0+dfsg-1.1ubuntu3+esm1"},{"binary_version":"5.5.0+dfsg-1.1ubuntu3+esm1","binary_name":"libradare2-common"},{"binary_name":"radare2","binary_version":"5.5.0+dfsg-1.1ubuntu3+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4021.json"}},{"package":{"name":"radare2","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/radare2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.9.8+dfsg-2","5.9.8+dfsg-2ubuntu0.25.10.1","5.9.8+dfsg-2ubuntu0.25.10.2"],"ecosystem_specific":{"binaries":[{"binary_name":"libradare2-5.0.0t64","binary_version":"5.9.8+dfsg-2ubuntu0.25.10.2"},{"binary_version":"5.9.8+dfsg-2ubuntu0.25.10.2","binary_name":"libradare2-common"},{"binary_name":"radare2","binary_version":"5.9.8+dfsg-2ubuntu0.25.10.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4021.json"}},{"package":{"name":"radare2","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/radare2?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.9.8+dfsg-2","6.0.4+dfsg-1","6.0.7+ds-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libradare2-6.0.0t64","binary_version":"6.0.7+ds-1"},{"binary_version":"6.0.7+ds-1","binary_name":"libradare2-common"},{"binary_name":"radare2","binary_version":"6.0.7+ds-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4021.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":"medium"}]}