CVE-2025-24182 is an out-of-bounds read vulnerability in the font processing component of Apple iOS and iPadOS. The flaw stems from improper input validation when handling font data, allowing a maliciously crafted font file to cause the system to read memory beyond the intended buffer boundaries. This can lead to the disclosure of sensitive process memory, potentially exposing confidential information such as cryptographic keys, user data, or other sensitive runtime information. The vulnerability affects multiple Apple operating systems, including iOS, iPadOS, macOS Sequoia, tvOS, visionOS, and watchOS, with patches released in versions 18.4 (iOS/iPadOS) and equivalent versions for other platforms. Exploitation requires user interaction, such as opening or previewing a malicious font, and can be performed without elevated privileges. The CVSS v3.1 score is 5.5 (medium), reflecting the local attack vector, low complexity, no privileges required, and user interaction needed. The vulnerability is categorized under CWE-125 (Out-of-bounds Read). No public exploits have been reported yet, but the potential for sensitive data leakage makes timely patching critical.

The primary impact of CVE-2025-24182 is the unauthorized disclosure of process memory, which compromises confidentiality. Attackers could leverage this vulnerability to extract sensitive information from affected devices, including personal data, authentication tokens, or cryptographic material. Although the vulnerability does not affect system integrity or availability, the exposure of confidential information can facilitate further attacks such as identity theft, unauthorized access, or espionage. Organizations relying on Apple mobile devices for sensitive communications or data storage face increased risk of data breaches. The requirement for user interaction limits large-scale automated exploitation, but targeted attacks against high-value individuals or organizations remain a concern. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially as threat actors often develop exploits after public disclosure.

To mitigate CVE-2025-24182, organizations and users should promptly update affected Apple devices to iOS 18.4, iPadOS 18.4, or later versions where the vulnerability is patched. Enterprises should enforce mobile device management (MDM) policies to ensure timely deployment of security updates across all managed devices. Users should exercise caution when opening or previewing fonts from untrusted sources, including email attachments, websites, or third-party applications. Disabling automatic font previews in email clients or messaging apps, if possible, can reduce exposure. Security teams should monitor for any emerging exploit code or indicators of compromise related to this vulnerability. Additionally, implementing application whitelisting and restricting installation of unapproved apps can help prevent delivery of malicious font files. Regular security awareness training emphasizing the risks of opening unexpected files can further reduce exploitation likelihood.