{"id":"CVE-2020-27950","aliases":[],"url":"https://o3.security/vulnerability/CVE-2020-27950","summary":"A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update…","details":"A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.","published":"2020-12-08T21:15:13.967","modified":"2026-06-17T03:09:55.770","cvss":{"score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},"epss":{"score":0.16354,"percentile":0.96716,"asOf":"2026-08-25"},"cisaKev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","knownRansomwareCampaignUse":false},"exploitsKnown":6,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"},{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2020/Dec/32"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211928"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211929"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211931"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211940"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211944"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211945"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211946"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211947"},{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailers-Memory-Disclosure.html"},{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2020/Dec/32"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211928"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211929"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211931"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211940"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211944"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211945"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211946"},{"type":"ADVISORY","url":"https://support.apple.com/en-us/HT211947"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-27950"}],"provenance":{"sources":["OSV.dev","NVD","CISA KEV","FIRST.org (EPSS)"],"lastVerified":"2026-06-17T03:09:55.770"}}