Apple tvOS up to 18.4 Web memory corruption

Summaryinfo

A vulnerability identified as critical has been detected in Apple tvOS. Affected is an unknown function of the component Web Handler. This manipulation causes memory corruption. This vulnerability is registered as CVE-2025-43343. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Apple tvOS. Affected by this vulnerability is some unknown functionality 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 Safari 26, tvOS 26, watchOS 26, iOS 26 and iPadOS 26, visionOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.

It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2025-43343 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. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 270564 (RHEL 9 : webkit2gtk3 (RHSA-2025:18097)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (270564) and CERT Bund (WID-SEC-2025-2269). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Red Hat Enterprise Linux
• Fedora Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• IGEL OS
• Open Source WebKitGTK

Productinfo

Type

• Digital Media Player

Vendor

• Apple

Name

• tvOS

Version

• 9.2.2
• 10
• 10.0
• 10.0.1
• 10.1
• 10.1.1
• 10.2
• 10.2.1
• 10.2.2
• 10.15.0
• 11.0
• 11.1
• 11.2
• 11.2.1
• 11.2.5
• 11.2.6
• 11.3
• 11.4
• 11.4.1
• 12.0
• 12.1
• 12.1.1
• 12.1.2
• 12.2
• 12.3
• 12.4
• 12.7
• 13.0
• 13.2
• 13.3.1
• 13.4
• 13.4.5
• 13.4.6
• 13.4.8
• 13.6
• 13.7
• 14.0
• 14.2
• 14.3
• 14.4
• 14.5
• 14.6
• 14.7
• 15
• 15.0
• 15.1
• 15.2
• 15.3
• 15.4
• 15.5
• 15.6
• 15.7.1
• 16.1
• 16.2
• 16.3
• 16.4
• 16.5
• 16.6
• 16.7
• 17.4
• 17.5
• 18
• 18.1
• 18.2
• 18.4

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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