{"id":"CVE-2021-30857","aliases":["EUVD-2021-17774"],"status":"published","description":"A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.","severity":{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00916,"percentile":0.60476,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-362"],"published":"2021-08-24T18:49:22Z","modified":"2026-06-17T03:51:01Z","products":[{"vendor":"apple","product":"ipados"},{"vendor":"apple","product":"iphone_os"},{"vendor":"apple","product":"mac_os_x"},{"vendor":"apple","product":"macos"},{"vendor":"apple","product":"tvos"},{"vendor":"apple","product":"watchos"}],"references":[{"url":"https://support.apple.com/en-us/HT212804","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://support.apple.com/en-us/HT212805","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://support.apple.com/en-us/HT212807","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://support.apple.com/en-us/HT212814","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://support.apple.com/en-us/HT212819","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://support.apple.com/en-us/HT212815","tags":["x_refsource_MISC","x_transferred"]}],"sources":{"cve":[{"id":"CVE-2021-30857","description":"A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T18:49:22Z","modified":"2024-08-03T22:48:13.505Z","updated_at":"2026-11-02T14:33:02.20241Z"}],"euvd":[{"id":"EUVD-2021-17774","description":"A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T18:49:22Z","modified":"2024-08-03T22:48:13Z","updated_at":"2026-11-03T03:24:40.575187Z"}],"nvd":[{"id":"CVE-2021-30857","description":"A race condition was addressed with improved locking. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, watchOS 8, macOS Big Sur 11.6. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T19:15:14.167Z","modified":"2026-06-17T03:51:01.363Z","cvss":[{"version":"3.1","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.6,"vector":"AV:N/AC:H/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:06:57.318236Z"}]}}