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Vulnerability · Published Aug 24, 2021 · Assigned by apple

CVE-2021-30851

High 8.8

In plain English

A high-severity security flaw in iOS and iPadOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)8.8High
Exploit odds (30 days)2.4%top 15.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 15, tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing maliciously crafted web content may lead to code execution.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8webkit2gtk32.34.6-1.el8ALSA-2022:1777
AlmaLinux:8webkit2gtk3-devel2.34.6-1.el8ALSA-2022:1777
AlmaLinux:8webkit2gtk3-jsc2.34.6-1.el8ALSA-2022:1777
AlmaLinux:8webkit2gtk3-jsc-devel2.34.6-1.el8ALSA-2022:1777
Alpine:v3.20webkit2gtk2.34.0-r0ALPINE-CVE-2021-30851
Debian:12webkit2gtk2.34.0-1DEBIAN-CVE-2021-30851
Debian:13webkit2gtk2.34.0-1DEBIAN-CVE-2021-30851
Debian:14webkit2gtk2.34.0-1DEBIAN-CVE-2021-30851
Debian:12wpewebkit2.34.1-1DEBIAN-CVE-2021-30851
Debian:13wpewebkit2.34.1-1DEBIAN-CVE-2021-30851
Debian:14wpewebkit2.34.1-1DEBIAN-CVE-2021-30851
Rocky Linux:8webkit2gtk30:2.34.6-1.el8RLSA-2022:1777
Ubuntu:22.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2021-30851
Ubuntu:24.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2021-30851
Ubuntu:22.04:LTSwebkit2gtk2.34.0-1ubuntu1UBUNTU-CVE-2021-30851
Ubuntu:22.04:LTSwpewebkitno fix listedUBUNTU-CVE-2021-30851

Affected products (as reported)

VendorProductVersions
Apple iOS and iPadOS unspecified – before 15
Apple tvOS unspecified – before 15
Apple Safari unspecified – before 15
Apple watchOS unspecified – before 8

References