high
7.8
CWE
787
Advisory Published
CVE Published
Updated

CVE-2021-1840

First published: Mon Apr 26 2021(Updated: )

A memory corruption issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A local attacker may be able to elevate their privileges.

Credit: Zuozhi Fan @pattern_F_ Ant Group Tianqiong Security LabZuozhi Fan @pattern_F_ Ant Group Tianqiong Security Lab product-security@apple.com Zuozhi Fan @pattern_F_ Ant Group Tianqiong Security Lab

Affected SoftwareAffected VersionHow to fix
Apple macOS Big Sur<11.3
11.3
Apple Mojave
Apple Catalina
Apple Mac OS X=10.14
Apple Mac OS X=10.14.0
Apple Mac OS X=10.14.1
Apple Mac OS X=10.14.2
Apple Mac OS X=10.14.3
Apple Mac OS X=10.14.4
Apple Mac OS X=10.14.4-beta4
Apple Mac OS X=10.14.5
Apple Mac OS X=10.14.6
Apple Mac OS X=10.14.6
Apple Mac OS X=10.14.6-security_update_2019-001
Apple Mac OS X=10.14.6-security_update_2019-002
Apple Mac OS X=10.14.6-security_update_2019-004
Apple Mac OS X=10.14.6-security_update_2019-005
Apple Mac OS X=10.14.6-security_update_2019-006
Apple Mac OS X=10.14.6-security_update_2019-007
Apple Mac OS X=10.14.6-security_update_2020-001
Apple Mac OS X=10.14.6-security_update_2020-002
Apple Mac OS X=10.14.6-security_update_2020-003
Apple Mac OS X=10.14.6-security_update_2020-004
Apple Mac OS X=10.14.6-security_update_2020-005
Apple Mac OS X=10.14.6-security_update_2020-006
Apple Mac OS X=10.14.6-security_update_2020-007
Apple Mac OS X=10.14.6-security_update_2021-001
Apple Mac OS X=10.14.6-security_update_2021-002
Apple Mac OS X=10.15
Apple Mac OS X=10.15.1
Apple Mac OS X=10.15.2
Apple Mac OS X=10.15.3
Apple Mac OS X=10.15.4
Apple Mac OS X=10.15.5
Apple Mac OS X=10.15.6
Apple Mac OS X=10.15.6
Apple Mac OS X=10.15.6-supplemental_update
Apple Mac OS X=10.15.7
Apple Mac OS X=10.15.7
Apple Mac OS X=10.15.7-security_update_2020
Apple Mac OS X=10.15.7-security_update_2020-001
Apple Mac OS X=10.15.7-security_update_2020-005
Apple Mac OS X=10.15.7-security_update_2020-007
Apple Mac OS X=10.15.7-security_update_2021-001
Apple macOS>=11.0<11.3

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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-2021-1840?

    CVE-2021-1840 is a vulnerability in the kernel that allows memory corruption.

  • How can the CVE-2021-1840 vulnerability be exploited?

    The CVE-2021-1840 vulnerability can be exploited by an attacker to corrupt memory in the kernel.

  • What products are affected by CVE-2021-1840?

    CVE-2021-1840 affects Apple's Catalina, Mojave, and macOS Big Sur up to version 11.3.

  • What is the severity of CVE-2021-1840?

    The severity of CVE-2021-1840 is not specified.

  • How can I fix the CVE-2021-1840 vulnerability?

    To fix the CVE-2021-1840 vulnerability, users should update their Apple operating systems to the latest version available.

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