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Denial of Service Vulnerability in Apple Products 

Indian – Computer Emergency Response Team (https://www.cert-in.org.in)

Severity Rating: MEDIUM

Software Affected

Apple iOS / iPadOS versions prior to 18.7.1

Apple iOS / iPadOS versions prior to 26.0.1

Apple macOS Tahoe versions prior to 26.0.1

Apple macOS Sequoia versions prior to 15.7.1

Apple macOS Sonoma versions prior to 14.8.1

Apple visionOS versions prior to 26.0.1

Overview

A vulnerability has been reported in Apple products, which could be exploited by an attacker to cause denial of service conditions or corrupt process memory on the targeted system.

Target Audience:

All end-user organizations and individuals using Apple products.

Risk Assessment:

Medium risk of denial of service and data manipulation.

Impact Assessment:

Potential for application crashes, process instability, and service unavailability.

Description

This vulnerability exists in the FontParser component of Apple products due to an out-of-bounds write issue. A remote attacker could trigger the flaw by supplying or causing the system to process a maliciously crafted font.

Successful exploitation of this vulnerability could cause denial of service conditions on the targeted system.

Solution

Apply appropriate updates as mentioned by the vendor:

https://support.apple.com/en-us/125326

https://support.apple.com/en-us/125327

https://support.apple.com/en-us/125328

https://support.apple.com/en-us/125329

https://support.apple.com/en-us/125330

https://support.apple.com/en-us/125338

Vendor Information

Apple

https://support.apple.com/en-us/125326

https://support.apple.com/en-us/125327

https://support.apple.com/en-us/125328

https://support.apple.com/en-us/125329

https://support.apple.com/en-us/125330

https://support.apple.com/en-us/125338

References

Apple

https://support.apple.com/en-us/125326

https://support.apple.com/en-us/125327

https://support.apple.com/en-us/125328

https://support.apple.com/en-us/125329

https://support.apple.com/en-us/125330

https://support.apple.com/en-us/125338

CVE Name

CVE-2025-43400

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Thanks and Regards,

CERT-In

Incident Response Help Desk

e-mail: incident@cert-in.org.in

Phone: +91-11-22902657

Toll Free Number: 1800-11-4949

Toll Free Fax : 1800-11-6969

Web: http://www.cert-in.org.in

PGP Fingerprint: A768 083E 4475 5725 B81A A379 2156 C0C0 B620 D0B4

PGP Key information:

https://www.cert-in.org.in/s2cMainServlet?pageid=CONTACTUS

Postal address:

Indian Computer Emergency Response Team (CERT-In)

Ministry of Electronics and Information Technology

Government of India

Electronics Niketan

6, C.G.O. Complex

New Delhi-110 003

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