Apple iOS/iPadOS/Safari/visionOS/macOS up to 26.1 Web memory corruption

Summaryinfo

A vulnerability was found in Apple iOS, iPadOS, Safari, visionOS and macOS up to 26.1. It has been rated as critical. The affected element is an unknown function of the component Web Handler. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2025-43535. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Apple iOS, iPadOS, Safari, visionOS and macOS up to 26.1. It has been declared as critical. Affected by this vulnerability is an unknown function 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 confidentiality, integrity, and availability. The summary by CVE is:

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, visionOS 26.2. Processing maliciously crafted web content may lead to an unexpected process crash.

The advisory is shared at support.apple.com. This vulnerability is known as CVE-2025-43535 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 $25k-$100k at the moment (estimation calculated on 01/25/2026).

The vulnerability scanner Nessus provides a plugin with the ID 279093 (Debian dsa-6083 : gir1.2-javascriptcoregtk-4.0 - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (279093) and CERT Bund (WID-SEC-2025-2891). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• Open Source WebKitGTK

Productinfo

Type

• Smartphone Operating System

Vendor

• Apple

Name

• iOS
• iPadOS
• macOS
• Safari
• visionOS

Version

• 26.0
• 26.1

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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