{"id":"USN-4942-1","summary":"firefox vulnerability","details":"A race condition was discovered in Web Render Components. If a user were\ntricked into opening a specially crafted website, an attacker could\npotentially exploit this to execute arbitrary code.\n","modified":"2026-04-22T10:14:43.448887Z","published":"2021-05-10T21:10:49Z","related":["UBUNTU-CVE-2021-29952"],"upstream":["CVE-2021-29952","UBUNTU-CVE-2021-29952"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4942-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29952"}],"affected":[{"package":{"name":"firefox","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/firefox@88.0.1+build1-0ubuntu0.18.04.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"88.0.1+build1-0ubuntu0.18.04.2"}]}],"versions":["56.0+build6-0ubuntu1","57.0.1+build2-0ubuntu1","59.0.1+build1-0ubuntu1","59.0.2+build1-0ubuntu1","60.0+build2-0ubuntu1","60.0.1+build2-0ubuntu0.18.04.1","60.0.2+build1-0ubuntu0.18.04.1","61.0+build3-0ubuntu0.18.04.1","61.0.1+build1-0ubuntu0.18.04.1","62.0+build2-0ubuntu0.18.04.3","62.0+build2-0ubuntu0.18.04.4","62.0+build2-0ubuntu0.18.04.5","62.0.3+build1-0ubuntu0.18.04.1","63.0+build2-0ubuntu0.18.04.2","63.0.3+build1-0ubuntu0.18.04.1","64.0+build3-0ubuntu0.18.04.1","65.0+build2-0ubuntu0.18.04.1","65.0.1+build2-0ubuntu0.18.04.1","66.0+build3-0ubuntu0.18.04.1","66.0.1+build1-0ubuntu0.18.04.1","66.0.2+build1-0ubuntu0.18.04.1","66.0.3+build1-0ubuntu0.18.04.1","66.0.4+build3-0ubuntu0.18.04.1","66.0.5+build1-0ubuntu0.18.04.1","67.0+build2-0ubuntu0.18.04.1","67.0.1+build1-0ubuntu0.18.04.1","67.0.2+build2-0ubuntu0.18.04.1","67.0.3+build1-0ubuntu0.18.04.1","67.0.4+build1-0ubuntu0.18.04.1","68.0+build3-0ubuntu0.18.04.1","68.0.1+build1-0ubuntu0.18.04.1","68.0.2+build1-0ubuntu0.18.04.1","69.0+build2-0ubuntu0.18.04.1","69.0.1+build1-0ubuntu0.18.04.1","69.0.2+build1-0ubuntu0.18.04.1","70.0+build2-0ubuntu0.18.04.1","70.0.1+build1-0ubuntu0.18.04.1","71.0+build5-0ubuntu0.18.04.1","72.0.1+build1-0ubuntu0.18.04.1","72.0.2+build1-0ubuntu0.18.04.1","73.0+build3-0ubuntu0.18.04.1","73.0.1+build1-0ubuntu0.18.04.1","74.0+build3-0ubuntu0.18.04.1","74.0.1+build1-0ubuntu0.18.04.1","75.0+build3-0ubuntu0.18.04.1","76.0+build2-0ubuntu0.18.04.1","76.0.1+build1-0ubuntu0.18.04.1","77.0.1+build1-0ubuntu0.18.04.1","78.0.1+build1-0ubuntu0.18.04.1","78.0.2+build2-0ubuntu0.18.04.1","79.0+build1-0ubuntu0.18.04.1","80.0+build2-0ubuntu0.18.04.1","80.0.1+build1-0ubuntu0.18.04.1","81.0+build2-0ubuntu0.18.04.1","81.0.2+build1-0ubuntu0.18.04.1","82.0+build2-0ubuntu0.18.04.1","82.0.2+build1-0ubuntu0.18.04.1","82.0.3+build1-0ubuntu0.18.04.1","83.0+build2-0ubuntu0.18.04.2","84.0+build3-0ubuntu0.18.04.1","84.0.1+build1-0ubuntu0.18.04.1","84.0.2+build1-0ubuntu0.18.04.1","85.0+build1-0ubuntu0.18.04.1","85.0.1+build1-0ubuntu0.18.04.1","86.0+build3-0ubuntu0.18.04.1","86.0.1+build1-0ubuntu0.18.04.1","87.0+build3-0ubuntu0.18.04.2","88.0+build2-0ubuntu0.18.04.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"firefox","binary_version":"88.0.1+build1-0ubuntu0.18.04.2"},{"binary_name":"firefox-geckodriver","binary_version":"88.0.1+build1-0ubuntu0.18.04.2"},{"binary_name":"firefox-mozsymbols","binary_version":"88.0.1+build1-0ubuntu0.18.04.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4942-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-29952"}]}}},{"package":{"name":"firefox","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/firefox@88.0.1+build1-0ubuntu0.20.04.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"88.0.1+build1-0ubuntu0.20.04.2"}]}],"versions":["69.0.3+build1-0ubuntu1","70.0+build2-0ubuntu1","70.0+build2-0ubuntu2","70.0.1+build1-0ubuntu2","71.0+build2-0ubuntu2","71.0+build5-0ubuntu1","72.0.1+build1-0ubuntu1","72.0.2+build1-0ubuntu1","73.0+build1-0ubuntu1","73.0+build2-0ubuntu1","73.0+build3-0ubuntu1","73.0.1+build1-0ubuntu1","74.0+build1-0ubuntu1","74.0+build2-0ubuntu1","74.0+build2-0ubuntu2","74.0+build3-0ubuntu1","75.0+build3-0ubuntu1","76.0+build2-0ubuntu0.20.04.1","76.0.1+build1-0ubuntu0.20.04.1","77.0.1+build1-0ubuntu0.20.04.1","78.0.1+build1-0ubuntu0.20.04.1","78.0.2+build2-0ubuntu0.20.04.1","79.0+build1-0ubuntu0.20.04.1","80.0+build2-0ubuntu0.20.04.1","80.0.1+build1-0ubuntu0.20.04.1","81.0+build2-0ubuntu0.20.04.1","81.0.2+build1-0ubuntu0.20.04.1","82.0+build2-0ubuntu0.20.04.1","82.0.2+build1-0ubuntu0.20.04.1","82.0.3+build1-0ubuntu0.20.04.1","83.0+build2-0ubuntu0.20.04.1","84.0+build3-0ubuntu0.20.04.1","84.0.1+build1-0ubuntu0.20.04.1","84.0.2+build1-0ubuntu0.20.04.1","85.0+build1-0ubuntu0.20.04.1","85.0.1+build1-0ubuntu0.20.04.1","86.0+build3-0ubuntu0.20.04.1","86.0.1+build1-0ubuntu0.20.04.1","87.0+build3-0ubuntu0.20.04.2","88.0+build2-0ubuntu0.20.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"firefox","binary_version":"88.0.1+build1-0ubuntu0.20.04.2"},{"binary_name":"firefox-geckodriver","binary_version":"88.0.1+build1-0ubuntu0.20.04.2"},{"binary_name":"firefox-mozsymbols","binary_version":"88.0.1+build1-0ubuntu0.20.04.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4942-1.json","cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-29952"}]}}}],"schema_version":"1.7.5"}