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Vulnerability · Published Aug 24, 2021 · Assigned by apple

CVE-2021-30953

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 2.0% (higher than 80% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)8.8High
Exploit odds (30 days)2.0%top 19.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An out-of-bounds read was addressed with improved bounds checking. 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.

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:v3.20webkit2gtk2.34.4-r0ALPINE-CVE-2021-30953
Debian:12webkit2gtk2.34.4-1DEBIAN-CVE-2021-30953
Debian:13webkit2gtk2.34.4-1DEBIAN-CVE-2021-30953
Debian:14webkit2gtk2.34.4-1DEBIAN-CVE-2021-30953
Debian:12wpewebkit2.34.4-1DEBIAN-CVE-2021-30953
Debian:13wpewebkit2.34.4-1DEBIAN-CVE-2021-30953
Debian:14wpewebkit2.34.4-1DEBIAN-CVE-2021-30953
Rocky Linux:8webkit2gtk30:2.34.6-1.el8RLSA-2022:1777
Ubuntu:22.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2021-30953
Ubuntu:24.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2021-30953
Ubuntu:22.04:LTSwpewebkitno fix listedUBUNTU-CVE-2021-30953

Affected products (as reported)

VendorProductVersions
Apple watchOS unspecified – before 8.3
Apple iOS and iPadOS unspecified – before 15.2
Apple macOS unspecified – before 12.1
Apple macOS unspecified – before 15.2
Apple macOS unspecified – before 15.2

References