{"id":"USN-5156-1","summary":"A security issue was fixed in ICU","details":"It was discovered that ICU contains a double free issue.\nAn attacker could use this issue to cause a denial of service or possibly execute arbitrary code.\n","modified":"2026-04-22T10:18:44.214692Z","published":"2021-11-24T17:26:57Z","related":["UBUNTU-CVE-2021-30535"],"upstream":["CVE-2021-30535","UBUNTU-CVE-2021-30535"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5156-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-30535"}],"affected":[{"package":{"name":"icu","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/icu@66.1-2ubuntu2.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"66.1-2ubuntu2.1"}]}],"versions":["63.2-2","65.1-1ubuntu2","66.1-2ubuntu2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"66.1-2ubuntu2.1","binary_name":"icu-devtools"},{"binary_version":"66.1-2ubuntu2.1","binary_name":"libicu66"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-30535"}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5156-1.json"}}],"schema_version":"1.7.5"}