critical
9.3
CWE
119 120
Advisory Published
Updated

CVE-2021-30977: Buffer Overflow

First published: Tue Aug 24 2021(Updated: )

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A malicious application may be able to execute arbitrary code with kernel privileges.

Credit: Jack Dates RET2 Systems IncJack Dates RET2 Systems IncJack Dates RET2 Systems Inc cve@mitre.org Jack Dates RET2 Systems Inc

Affected SoftwareAffected VersionHow to fix
Apple macOS Monterey<12.3
12.3
Apple macOS Big Sur<11.6.2
11.6.2
Apple Catalina
Apple Mac OS X>=10.15<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-security_update_2021-007
Apple Mac OS X=10.15.7-supplemental_update
Apple macOS>=11.0<11.6.2
Apple macOS>=12.0<12.3

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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-2021-30977?

    CVE-2021-30977 is a vulnerability in Graphics Drivers that allows for a buffer overflow due to inadequate bounds checking.

  • How does CVE-2021-30977 affect Apple Catalina?

    Apple Catalina is affected by CVE-2021-30977.

  • How does CVE-2021-30977 affect macOS Monterey 12.1?

    macOS Monterey 12.1 is affected by CVE-2021-30977.

  • How does CVE-2021-30977 affect macOS Big Sur 11.6.2?

    macOS Big Sur 11.6.2 is affected by CVE-2021-30977.

  • How can I fix CVE-2021-30977?

    To fix CVE-2021-30977, you should apply the necessary security updates provided by Apple.

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