critical
9.3
Advisory Published
CVE Published
Updated

CVE-2021-30821

First published: Mon Oct 25 2021(Updated: )

A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.0.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. A malicious application may be able to execute arbitrary code with kernel privileges.

Credit: Tim Michaud @TimGMichaud Zoom Video CommunicationsTim Michaud @TimGMichaud Zoom Video Communications product-security@apple.com Tim Michaud @TimGMichaud Zoom Video Communications

Affected SoftwareAffected VersionHow to fix
Apple macOS Monterey<12.0.1
12.0.1
Apple Catalina
Apple macOS Big Sur<11.6.1
11.6.1
Apple Mac OS X<10.15.7
Apple Mac OS X=10.15.7
Apple Mac OS X=10.15.7-security_update_2020-001
Apple Mac OS X=10.15.7-security_update_2021-001
Apple Mac OS X=10.15.7-security_update_2021-002
Apple Mac OS X=10.15.7-security_update_2021-003
Apple Mac OS X=10.15.7-security_update_2021-004
Apple Mac OS X=10.15.7-security_update_2021-005
Apple Mac OS X=10.15.7-security_update_2021-006
Apple Mac OS X=10.15.7-supplemental_update
Apple macOS>=11.0<11.6.1
Apple macOS>=12.0.0<12.0.1

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2021-30821?

    CVE-2021-30821 is a memory corruption issue in IOGraphics that has been addressed with improved memory handling.

  • Which software versions are affected by CVE-2021-30821?

    macOS Big Sur versions up to 11.6.1, macOS Catalina, and macOS Monterey versions up to 12.0.1 are affected by CVE-2021-30821.

  • How can I fix CVE-2021-30821?

    To fix CVE-2021-30821, update your macOS Big Sur to version 11.6.1, or update your macOS Monterey to version 12.0.1 if you're using that version.

  • Where can I find more information about CVE-2021-30821?

    You can find more information about CVE-2021-30821 on the Apple support page: [link1], [link2], [link3].

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