high
8.8
CWE
416
Advisory Published
CVE Published
Updated

CVE-2021-1876: Use After Free

First published: Mon Apr 26 2021(Updated: )

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. Processing maliciously crafted web content may lead to arbitrary code execution.

Credit: Matthew Denton Google ChromeMatthew Denton Google Chrome product-security@apple.com Matthew Denton Google Chrome

Affected SoftwareAffected VersionHow to fix
Apple macOS Big Sur<11.3
11.3
Apple Mojave
Apple Catalina
Apple Mac OS X>=10.14<=10.14.5
Apple Mac OS X>=10.15<=10.15.5
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=10.14.6-supplemental_update
Apple Mac OS X=10.14.6-supplemental_update_2
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-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 Mac OS X=10.15.7-supplemental_update
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-2021-1876?

    CVE-2021-1876 is a vulnerability in NSRemoteView that allows for a use after free issue.

  • What is the severity of CVE-2021-1876?

    The severity of CVE-2021-1876 is not mentioned in the provided information.

  • How does CVE-2021-1876 affect Apple Catalina?

    Apple Catalina is affected by CVE-2021-1876.

  • How does CVE-2021-1876 affect Apple Mojave?

    Apple Mojave is affected by CVE-2021-1876.

  • How does CVE-2021-1876 affect macOS Big Sur?

    macOS Big Sur version up to exclusive 11.3 is affected by CVE-2021-1876.

  • How can CVE-2021-1876 be fixed?

    To fix CVE-2021-1876, apply the updates provided by Apple.

  • Where can I find more information about CVE-2021-1876?

    You can find more information about CVE-2021-1876 on Apple's support website.

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