Apple macOS Web memory corruption

Summaryinfo

A vulnerability marked as critical has been reported in Apple macOS. This affects an unknown part of the component Web Handler. This manipulation causes memory corruption. This vulnerability appears as CVE-2025-43212. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Apple macOS (the affected version is unknown). Affected by this vulnerability is an unknown code of the component Web Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. The summary by CVE is:

The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.6, iOS 18.6 and iPadOS 18.6, tvOS 18.6, watchOS 11.6, visionOS 2.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.

The advisory is shared at support.apple.com. This vulnerability is known as CVE-2025-43212 since 04/16/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/26/2025).

The vulnerability scanner Nessus provides a plugin with the ID 245574 (Fedora 42 : webkitgtk (2025-61ca72f430)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (245574) and CERT Bund (WID-SEC-2025-1703). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Fedora Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• IGEL OS
• Open Source WebKitGTK

Productinfo

Type

• Operating System

Vendor

• Apple

Name

• macOS

License

• commercial

Website

• Vendor: https://www.apple.com/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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