high
8.8
CWE
416
Advisory Published
Updated

CVE-2021-30936: Use After Free

First published: Tue Aug 24 2021(Updated: )

A use after free issue was addressed with improved memory management. This issue is fixed in tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS 15.2 and iPadOS 15.2, watchOS 8.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Credit: Chijin Zhou ShuiMuYuLin LtdTsinghua wingtecher lab Pangu Chijin Zhou ShuiMuYuLin LtdTsinghua wingtecher lab Pangu via Tianfu Cup Chijin Zhou ShuiMuYuLin LtdTsinghua wingtecher lab Pangu via Tianfu Cup Chijin Zhou ShuiMuYuLin LtdTsinghua wingtecher lab Pangu via Tianfu Cup Chijin Zhou ShuiMuYuLin LtdTsinghua wingtecher lab Pangu via Tianfu Cup cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Apple Safari<15.2
Apple iPadOS<15.2
Apple iPhone OS<15.2
Apple macOS>=12.0<12.1
Apple tvOS<15.2
Apple watchOS<8.3
Fedoraproject Fedora=34
Debian Debian Linux=10.0
Debian Debian Linux=11.0
Apple watchOS<8.3
8.3
Apple macOS Monterey<12.1
12.1
Apple Safari<15.2
15.2
debian/webkit2gtk
2.36.4-1~deb10u1
2.38.6-0+deb10u1
2.40.5-1~deb11u1
2.42.1-1~deb11u2
2.40.5-1~deb12u1
2.42.1-1~deb12u1
2.42.1-2
debian/wpewebkit
2.38.6-1~deb11u1
2.38.6-1
2.42.1-1

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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-2021-30936?

    CVE-2021-30936 is a vulnerability in WebKit that allows a use after free issue to occur due to inadequate memory management.

  • Which software is affected by CVE-2021-30936?

    CVE-2021-30936 affects the following software: macOS Monterey 12.1, Safari 15.2, iOS 15.2, iPadOS 15.2, watchOS 8.3, and tvOS 15.2.

  • What is the severity of CVE-2021-30936?

    The severity of CVE-2021-30936 is not specified in the provided information.

  • How can I fix CVE-2021-30936?

    To fix CVE-2021-30936, it is recommended to update the affected software to the specified versions.

  • Where can I find more information about CVE-2021-30936?

    You can find more information about CVE-2021-30936 on the official Apple support page linked in the references section.

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