CVE-2025-24199 is a vulnerability identified in Apple macOS that stems from an uncontrolled format string issue, categorized under CWE-400 (Uncontrolled Resource Consumption). This flaw allows a malicious application to supply crafted input that is improperly validated, leading to a denial-of-service condition by exhausting system resources or causing a crash. The vulnerability affects multiple macOS versions prior to the patched releases: macOS Sequoia 15.4, macOS Sonoma 14.7.5, and macOS Ventura 13.7.5. The root cause is inadequate input validation in certain system components handling format strings, which attackers can exploit to trigger resource exhaustion or application crashes. Exploitation requires local access and user interaction but does not require elevated privileges, making it accessible to unprivileged users who can convince a user to run a malicious app. The impact is limited to availability disruption, with no direct compromise of confidentiality or integrity. Apple has addressed the issue by improving input validation in the affected components. No public exploits have been reported, indicating a low likelihood of widespread exploitation currently. The CVSS v3.1 score of 5.5 reflects medium severity, considering the attack vector is local, the attack complexity is low, no privileges are required, but user interaction is necessary. This vulnerability highlights the importance of robust input validation to prevent resource exhaustion attacks in operating system components.

The primary impact of CVE-2025-24199 is denial-of-service, which can disrupt availability of affected macOS systems. For organizations, this could mean temporary loss of productivity, interruption of critical services, or forced system reboots. While the vulnerability does not allow data theft or system compromise, repeated or targeted exploitation could degrade system reliability and user trust. In environments where macOS is used for critical operations—such as creative industries, software development, or enterprise environments relying on Apple hardware—this DoS could have operational and financial consequences. Since exploitation requires local access and user interaction, the risk is mitigated somewhat by the need for user involvement, but insider threats or social engineering could still trigger attacks. The absence of known exploits reduces immediate risk, but unpatched systems remain vulnerable. Organizations with large macOS deployments should prioritize patching to maintain system stability and prevent potential disruption.

1. Apply the official patches released by Apple for macOS Sequoia 15.4, Sonoma 14.7.5, and Ventura 13.7.5 immediately to remediate the vulnerability. 2. Restrict installation of untrusted or unsigned applications to reduce the risk of malicious apps exploiting this vulnerability. 3. Implement endpoint protection solutions that monitor for abnormal application behavior indicative of resource exhaustion or crashes. 4. Educate users about the risks of running unverified applications and the importance of avoiding suspicious software to reduce user interaction risk. 5. Employ application whitelisting and least privilege principles to limit the ability of unprivileged users to execute potentially harmful code. 6. Monitor system logs for signs of repeated crashes or resource exhaustion patterns that may indicate exploitation attempts. 7. For high-security environments, consider additional controls such as sandboxing or virtualization to isolate untrusted applications. These measures go beyond generic advice by focusing on reducing the attack surface, limiting local app execution, and enhancing detection of DoS attempts.