CVE-2025-24139 is a vulnerability identified in Apple macOS that arises when the operating system parses a maliciously crafted file, leading to unexpected application termination. The root cause is related to improper bounds checking during file parsing, categorized under CWE-787 (Out-of-bounds Write), which can cause memory corruption. This vulnerability affects multiple macOS versions before the patched releases: macOS Sequoia 15.3, Sonoma 14.7.3, Ventura 13.7.3, and Ventura 13.7.5. The flaw allows an attacker to cause denial of service by crashing applications, potentially leading to further exploitation avenues such as privilege escalation or arbitrary code execution, although no such exploits are currently known. The CVSS v3.1 base score is 7.8, indicating high severity, with an attack vector of local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), but user interaction required (UI:R). The scope is unchanged (S:U), but the impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H), reflecting the potential for significant disruption. The vulnerability was addressed by Apple through improved input validation and bounds checking in the affected macOS versions. No public exploit code or active exploitation has been reported, but the risk remains for targeted attacks or malware leveraging this flaw. Organizations relying on macOS systems should prioritize patching to prevent potential denial of service or escalation scenarios.

The primary impact of CVE-2025-24139 is denial of service through unexpected application termination, which can disrupt user productivity and critical business operations. Given the high confidentiality and integrity impact ratings, there is a potential risk that exploitation could lead to memory corruption scenarios enabling further attacks such as privilege escalation or arbitrary code execution, although this has not been confirmed. The requirement for local access and user interaction limits remote exploitation but does not eliminate risk, especially in environments where users may open untrusted files or receive malicious attachments. Organizations with macOS-dependent infrastructure, especially those in sectors like technology, finance, healthcare, and government, could face operational disruptions and data exposure risks if the vulnerability is exploited. The absence of known exploits in the wild reduces immediate threat but does not preclude future attacks. Failure to patch could lead to targeted attacks leveraging this vulnerability to compromise system stability and security.

1. Immediately apply the security updates released by Apple for macOS Sequoia 15.3, Sonoma 14.7.3, Ventura 13.7.3, and Ventura 13.7.5 to ensure the vulnerability is patched. 2. Implement strict file handling policies that restrict opening files from untrusted or unknown sources, especially in environments where users have elevated privileges. 3. Educate users about the risks of opening suspicious files and encourage cautious behavior to reduce the likelihood of triggering the vulnerability. 4. Employ endpoint protection solutions that monitor for abnormal application crashes or suspicious file parsing activities to detect potential exploitation attempts. 5. Use application whitelisting and sandboxing techniques to limit the impact of application crashes and prevent escalation. 6. Regularly audit and monitor macOS systems for unusual behavior or crashes that could indicate exploitation attempts. 7. Maintain up-to-date backups and incident response plans to quickly recover from potential denial of service or compromise scenarios.