{"id":"UBUNTU-CVE-2021-23988","details":"Mozilla developers reported memory safety bugs present in Firefox 86. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox \u003c 87.","modified":"2026-01-30T01:38:42.579493Z","published":"2021-03-25T00:00:00Z","related":["USN-4893-1"],"upstream":["CVE-2021-23988"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23988"},{"type":"REPORT","url":"https://www.mozilla.org/en-US/security/advisories/mfsa2021-10/#CVE-2021-23988"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4893-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-23988"}],"affected":[{"package":{"name":"firefox","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/firefox@87.0+build3-0ubuntu0.16.04.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"87.0+build3-0ubuntu0.16.04.2"}]}],"versions":["41.0.2+build2-0ubuntu1","42.0+build2-0ubuntu1","44.0+build3-0ubuntu2","44.0.1+build1-0ubuntu1","44.0.2+build1-0ubuntu1","45.0+build2-0ubuntu1","45.0.1+build1-0ubuntu1","45.0.2+build1-0ubuntu1","46.0+build5-0ubuntu0.16.04.2","46.0.1+build1-0ubuntu0.16.04.2","47.0+build3-0ubuntu0.16.04.1","48.0+build2-0ubuntu0.16.04.1","49.0+build4-0ubuntu0.16.04.1","49.0.2+build2-0ubuntu0.16.04.2","50.0+build2-0ubuntu0.16.04.2","50.0.2+build1-0ubuntu0.16.04.1","50.1.0+build2-0ubuntu0.16.04.1","51.0.1+build2-0ubuntu0.16.04.1","51.0.1+build2-0ubuntu0.16.04.2","52.0+build2-0ubuntu0.16.04.1","52.0.1+build2-0ubuntu0.16.04.1","52.0.2+build1-0ubuntu0.16.04.1","53.0+build6-0ubuntu0.16.04.1","53.0.2+build1-0ubuntu0.16.04.2","53.0.3+build1-0ubuntu0.16.04.2","54.0+build3-0ubuntu0.16.04.1","55.0.1+build2-0ubuntu0.16.04.2","55.0.2+build1-0ubuntu0.16.04.1","56.0+build6-0ubuntu0.16.04.1","56.0+build6-0ubuntu0.16.04.2","57.0+build4-0ubuntu0.16.04.5","57.0+build4-0ubuntu0.16.04.6","57.0.1+build2-0ubuntu0.16.04.1","57.0.3+build1-0ubuntu0.16.04.1","57.0.4+build1-0ubuntu0.16.04.1","58.0+build6-0ubuntu0.16.04.1","58.0.1+build1-0ubuntu0.16.04.1","58.0.2+build1-0ubuntu0.16.04.1","59.0+build5-0ubuntu0.16.04.1","59.0.1+build1-0ubuntu0.16.04.1","59.0.2+build1-0ubuntu0.16.04.1","59.0.2+build1-0ubuntu0.16.04.3","60.0+build2-0ubuntu0.16.04.1","60.0.1+build2-0ubuntu0.16.04.1","60.0.2+build1-0ubuntu0.16.04.1","61.0+build3-0ubuntu0.16.04.2","61.0.1+build1-0ubuntu0.16.04.1","62.0+build2-0ubuntu0.16.04.3","62.0+build2-0ubuntu0.16.04.4","62.0+build2-0ubuntu0.16.04.5","62.0.3+build1-0ubuntu0.16.04.2","63.0+build2-0ubuntu0.16.04.2","63.0.3+build1-0ubuntu0.16.04.1","64.0+build3-0ubuntu0.16.04.1","65.0+build2-0ubuntu0.16.04.1","65.0.1+build2-0ubuntu0.16.04.1","66.0+build3-0ubuntu0.16.04.2","66.0.1+build1-0ubuntu0.16.04.1","66.0.2+build1-0ubuntu0.16.04.1","66.0.3+build1-0ubuntu0.16.04.1","66.0.4+build3-0ubuntu0.16.04.1","66.0.5+build1-0ubuntu0.16.04.1","67.0+build2-0ubuntu0.16.04.1","67.0.1+build1-0ubuntu0.16.04.1","67.0.2+build2-0ubuntu0.16.04.1","67.0.3+build1-0ubuntu0.16.04.1","67.0.4+build1-0ubuntu0.16.04.1","68.0+build3-0ubuntu0.16.04.1","68.0.1+build1-0ubuntu0.16.04.1","68.0.2+build1-0ubuntu0.16.04.1","69.0+build2-0ubuntu0.16.04.4","69.0.1+build1-0ubuntu0.16.04.1","69.0.2+build1-0ubuntu0.16.04.1","70.0+build2-0ubuntu0.16.04.1","70.0.1+build1-0ubuntu0.16.04.1","71.0+build5-0ubuntu0.16.04.1","72.0.1+build1-0ubuntu0.16.04.1","72.0.2+build1-0ubuntu0.16.04.1","73.0.1+build1-0ubuntu0.16.04.1","74.0+build3-0ubuntu0.16.04.1","74.0.1+build1-0ubuntu0.16.04.1","75.0+build3-0ubuntu0.16.04.1","76.0+build2-0ubuntu0.16.04.1","76.0.1+build1-0ubuntu0.16.04.1","77.0.1+build1-0ubuntu0.16.04.1","78.0.1+build1-0ubuntu0.16.04.1","78.0.2+build2-0ubuntu0.16.04.1","79.0+build1-0ubuntu0.16.04.2","80.0+build2-0ubuntu0.16.04.1","80.0.1+build1-0ubuntu0.16.04.1","81.0+build2-0ubuntu0.16.04.1","81.0.2+build1-0ubuntu0.16.04.1","82.0+build2-0ubuntu0.16.04.5","82.0.2+build1-0ubuntu0.16.04.1","82.0.3+build1-0ubuntu0.16.04.1","83.0+build2-0ubuntu0.16.04.3","84.0+build3-0ubuntu0.16.04.1","84.0.1+build1-0ubuntu0.16.04.1","84.0.2+build1-0ubuntu0.16.04.1","85.0+build1-0ubuntu0.16.04.1","85.0.1+build1-0ubuntu0.16.04.1","86.0+build3-0ubuntu0.16.04.1","86.0.1+build1-0ubuntu0.16.04.2"],"ecosystem_specific":{"binaries":[{"binary_name":"firefox","binary_version":"87.0+build3-0ubuntu0.16.04.2"},{"binary_name":"firefox-dev","binary_version":"87.0+build3-0ubuntu0.16.04.2"},{"binary_name":"firefox-geckodriver","binary_version":"87.0+build3-0ubuntu0.16.04.2"},{"binary_name":"firefox-mozsymbols","binary_version":"87.0+build3-0ubuntu0.16.04.2"}],"availability":"No 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