{"id":"UBUNTU-CVE-2021-20266","details":"A flaw was found in RPM's hdrblobInit() in lib/header.c. This flaw allows an attacker who can modify the rpmdb to cause an out-of-bounds read. The highest threat from this vulnerability is to system availability.","modified":"2026-04-22T14:32:53.015782Z","published":"2021-04-30T12:15:00Z","related":["USN-5273-1"],"upstream":["CVE-2021-20266"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-20266"},{"type":"REPORT","url":"https://github.com/rpm-software-management/rpm/pull/1500"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5273-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-20266"}],"affected":[{"package":{"name":"rpm","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/rpm@4.14.1+dfsg1-2ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.1+dfsg1-2ubuntu0.1~esm1"}]}],"versions":["4.12.0.2+dfsg1-2build2","4.14.0+dfsg1-2","4.14.1+dfsg1-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"debugedit","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1","binary_name":"librpm8"},{"binary_name":"librpmbuild8","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"librpmio8","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"librpmsign8","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"python-rpm","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"python3-rpm","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"rpm","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"rpm-common","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"rpm-i18n","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"rpm2cpio","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20266.json"}},{"package":{"name":"rpm","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/rpm@4.14.2.1+dfsg1-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"}]}],"versions":["4.14.2.1+dfsg1-1","4.14.2.1+dfsg1-1build1","4.14.2.1+dfsg1-1build2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"debugedit","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"librpm8","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"librpmbuild8","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"librpmio8","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"librpmsign8","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"python-rpm","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"python3-rpm","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1","binary_name":"rpm"},{"binary_name":"rpm-common","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"rpm-i18n","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"rpm2cpio","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-20266.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:H"},{"type":"Ubuntu","score":"low"}]}