CVE-2025-24244 is a vulnerability identified in Apple’s iOS, iPadOS, macOS, tvOS, and watchOS platforms, stemming from improper memory handling when processing specially crafted font files. This flaw allows an attacker to cause the affected system to disclose portions of process memory, potentially leaking sensitive information such as cryptographic keys, user data, or other confidential information residing in memory. The vulnerability is classified under CWE-200 (Information Exposure) and has a CVSS v3.1 base score of 5.5, indicating medium severity. The attack vector requires local access (AV:L), no privileges (PR:N), but does require user interaction (UI:R), such as opening or previewing a malicious font file embedded in a document or application. The scope is unchanged (S:U), meaning the impact is limited to the vulnerable component without affecting other system components. The vulnerability does not affect integrity or availability but compromises confidentiality (C:H). Apple has released patches in multiple OS versions including iOS 18.4, iPadOS 18.4 and 17.7.6, macOS Sequoia 15.4, Sonoma 14.7.5, Ventura 13.7.5, tvOS 18.4, and watchOS 11.4 to address this issue by improving memory handling during font processing. No known exploits have been reported in the wild to date, but the vulnerability could be exploited in targeted attacks where an attacker convinces a user to open a malicious font or document containing such a font. The vulnerability highlights the risks associated with complex font rendering engines and the importance of robust memory management in preventing information disclosure.

The primary impact of CVE-2025-24244 is the unauthorized disclosure of process memory, which can lead to leakage of sensitive information such as encryption keys, authentication tokens, or personal user data. For organizations, this can result in compromised confidentiality of corporate or personal information, potentially enabling further attacks such as credential theft or espionage. Since the vulnerability requires user interaction but no privileges, attackers may exploit it via phishing or malicious documents containing crafted fonts. Although it does not affect system integrity or availability, the exposure of sensitive data can have serious consequences for privacy and security compliance. The risk is particularly significant for organizations handling sensitive or regulated data on Apple devices, including government agencies, financial institutions, healthcare providers, and enterprises with mobile workforces. The lack of known exploits in the wild reduces immediate risk, but the medium severity and ease of user interaction mean that timely patching is critical to prevent future exploitation.

Organizations and users should promptly apply the security updates released by Apple for iOS 18.4, iPadOS 18.4 and 17.7.6, macOS Sequoia 15.4, Sonoma 14.7.5, Ventura 13.7.5, tvOS 18.4, and watchOS 11.4 to remediate this vulnerability. Beyond patching, organizations should implement strict controls on the handling of untrusted documents and font files, including disabling automatic font rendering in email clients or document viewers where feasible. Employing endpoint protection solutions that detect and block suspicious font files or document exploits can add a layer of defense. User awareness training to avoid opening untrusted or unexpected attachments is essential to reduce the risk of user interaction exploitation. Network segmentation and monitoring for unusual file transfers or font-related anomalies can help detect potential exploitation attempts. For high-security environments, consider restricting the installation of new fonts or the use of custom fonts unless verified. Regular vulnerability scanning and compliance checks should include verification of patch levels on Apple devices to ensure timely remediation.