{"id":"CVE-2021-30937","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-30937","generatedAt":"2026-10-27T22:33:10.770Z","title":"A memory corruption vulnerability was addressed with improved locking.","description":"A memory corruption vulnerability was addressed with improved locking. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. A malicious application may be able to execute arbitrary code with kernel privileges.","published":"2021-08-24T19:15:21.000Z","lastModified":"2026-06-17T03:51:10.000Z","status":"Modified","sourceIdentifier":"product-security@apple.com","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["apple/ipados","apple/iphone os","apple/mac os x","apple/macos","apple/tvos","apple/watchos"],"epss":{"score":0.17294,"percentile":0.97086,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 17.3%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/165475/XNU-inm_merge-Heap-Use-After-Free.html","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212975","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212976","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212978","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212979","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212980","source":"product-security@apple.com"},{"url":"https://support.apple.com/en-us/HT212981","source":"product-security@apple.com"},{"url":"http://packetstormsecurity.com/files/165475/XNU-inm_merge-Heap-Use-After-Free.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212975","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212976","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212978","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212979","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212980","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/en-us/HT212981","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-30937","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}