{"id":"CVE-2021-30922","aliases":["EUVD-2021-17839"],"status":"published","description":"Multiple out-of-bounds write issues were addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00332,"percentile":0.266,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2021-08-24T18:50:24Z","modified":"2026-06-17T03:51:08Z","products":[{"vendor":"apple","product":"mac_os_x"},{"vendor":"apple","product":"macos"}],"references":[{"url":"https://support.apple.com/kb/HT212871","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://support.apple.com/kb/HT212869","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://support.apple.com/en-us/HT212872","tags":["x_refsource_MISC","x_transferred"]}],"sources":{"cve":[{"id":"CVE-2021-30922","description":"Multiple out-of-bounds write issues were addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T18:50:24Z","modified":"2024-08-03T22:48:13.809Z","updated_at":"2026-11-02T14:33:02.20241Z"}],"euvd":[{"id":"EUVD-2021-17839","description":"Multiple out-of-bounds write issues were addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T18:50:24Z","modified":"2024-08-03T22:48:13Z","updated_at":"2026-11-03T03:24:40.575187Z"}],"nvd":[{"id":"CVE-2021-30922","description":"Multiple out-of-bounds write issues were addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.","status":"published","published":"2021-08-24T19:15:19.673Z","modified":"2026-06-17T03:51:08.683Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:06:57.318236Z"}]}}