{"id":"CVE-2021-4128","state":"PUBLISHED","title":"When transitioning in and out of fullscreen mode, a graphics object was not correctly protected; resulting in memory corruption and a potentially exploitable crash.<br>*This bug on","description":"When transitioning in and out of fullscreen mode, a graphics object was not correctly protected; resulting in memory corruption and a potentially exploitable crash.<br>*This bug only affects Firefox on MacOS. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95.","publishedAt":"2022-12-22T00:00:00.000Z","updatedAt":"2025-04-16T15:58:19.476Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"95","versionType":"custom"}]}],"references":["https://www.mozilla.org/security/advisories/mfsa2021-52/","https://bugzilla.mozilla.org/show_bug.cgi?id=1735852"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T19:49:23.890Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/4xxx/CVE-2021-4128.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-4128","state":"PUBLISHED","datePublished":"2022-12-22T00:00:00.000Z","dateUpdated":"2025-04-16T15:58:19.476Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2021-12-16T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"When transitioning in and out of fullscreen mode, a graphics object was not correctly protected; resulting in memory corruption and a potentially exploitable crash.<br>*This bug only affects Firefox on MacOS. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"unspecified","status":"affected","lessThan":"95","versionType":"custom"}]}],"references":[{"url":"https://www.mozilla.org/security/advisories/mfsa2021-52/"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1735852"}],"problemTypes":[{"descriptions":[{"type":"text","lang":"en","description":"Use-after-free in fullscreen objects on MacOS"}]}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2022-12-22T00:00:00.000Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://www.mozilla.org/security/advisories/mfsa2021-52/","tags":["x_transferred"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1735852","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T17:16:04.265Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":6.5,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-04-16T15:57:08.090549Z","id":"CVE-2021-4128","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","type":"CWE","lang":"en","description":"CWE-416 Use After Free"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-04-16T15:58:19.476Z"}}]}}}