Apple watchOS up to 18.2 Video File out-of-bounds write

Summaryinfo

A vulnerability classified as critical has been found in Apple watchOS. This issue affects some unknown processing of the component Video File Handler. This manipulation causes out-of-bounds write. This vulnerability is registered as CVE-2025-43349. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple watchOS. It has been declared as critical. Affected by this vulnerability is some unknown processing of the component Video File Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in tvOS 26, macOS Sonoma 14.8, macOS Sequoia 15.7, iOS 18.7 and iPadOS 18.7, visionOS 26, watchOS 26, macOS Tahoe 26, iOS 26 and iPadOS 26. Processing a maliciously crafted video file may lead to unexpected app termination.

It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2025-43349 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 pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/16/2025).

Upgrading to version 26.0 eliminates this vulnerability.

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Productinfo

Type

• Smartwatch Operating System

Vendor

• Apple

Name

• watchOS

Version

• 2.2.2
• 3
• 3.1
• 3.1.1
• 3.1.3
• 3.2
• 3.2.2
• 3.2.3
• 4.0
• 4.2
• 4.2.2
• 4.2.3
• 4.3
• 4.3.1
• 4.3.2
• 4.4.2
• 5.0
• 5.1
• 5.1.3
• 5.2
• 5.2.1
• 5.3
• 5.3.2
• 5.3.7
• 5.3.9
• 6.0
• 6.1
• 6.1.2
• 6.2
• 6.2.4
• 6.2.5
• 6.2.6
• 6.2.8
• 6.2.9
• 7.0
• 7.0.3
• 7.1
• 7.2
• 7.3
• 7.3.2
• 7.3.3
• 7.4
• 7.4.1
• 7.5
• 7.6
• 7.6.2
• 8.0
• 8.1
• 8.3
• 8.4
• 8.5
• 8.6
• 8.7
• 8.8.1
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.5.1
• 9.5.2
• 9.6
• 10.0
• 10.5
• 10.15.0
• 10.15.1
• 12.1
• 13.0
• 13.7
• 14.0
• 15
• 15.1
• 18
• 18.1
• 18.2

License

• commercial

Website

• Vendor: https://www.apple.com/

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