CVE-2025-24256 is a critical security vulnerability identified in Apple macOS operating systems, specifically addressed in versions Ventura 13.7.5, Sequoia 15.4, and Sonoma 14.7.5. The vulnerability arises from improper bounds checking in kernel memory access routines, categorized under CWE-125 (Out-of-bounds Read). This flaw allows an unprivileged application to read kernel memory, potentially exposing sensitive information such as cryptographic keys, passwords, or other protected data. The vulnerability does not require any privileges or user interaction, making it remotely exploitable by any app running on the system. The CVSS v3.1 score of 9.8 reflects the high impact on confidentiality, integrity, and availability, as attackers could leverage the disclosed kernel memory to escalate privileges, execute arbitrary code, or cause system instability. Although no active exploits have been reported, the vulnerability's nature and ease of exploitation pose a significant risk. Apple has addressed the issue by implementing improved bounds checks in the kernel memory handling code. The vulnerability affects multiple macOS versions, but the exact affected versions prior to the fixed releases are unspecified. This flaw underscores the importance of kernel memory protection and rigorous input validation in operating system security.

For European organizations, this vulnerability poses a severe risk to data confidentiality and system integrity. Organizations relying on macOS for critical infrastructure, development environments, or endpoint devices could face unauthorized disclosure of sensitive kernel memory, enabling attackers to gain elevated privileges or execute arbitrary code. This could lead to data breaches, intellectual property theft, disruption of services, and potential lateral movement within networks. The vulnerability's lack of requirement for user interaction or privileges increases the likelihood of automated exploitation, raising the threat level for enterprises. Sectors such as finance, government, technology, and healthcare, which often use macOS devices and handle sensitive data, are particularly vulnerable. The potential for widespread impact is heightened by the common use of macOS in European corporate environments and the strategic importance of protecting personal data under regulations like GDPR.

European organizations should immediately prioritize deploying the security updates macOS Ventura 13.7.5, Sequoia 15.4, and Sonoma 14.7.5 across all affected devices. Beyond patching, organizations should restrict app installation to trusted sources such as the Apple App Store and enforce strict application whitelisting policies to reduce the risk of malicious apps exploiting this vulnerability. Employing endpoint detection and response (EDR) solutions capable of monitoring unusual kernel memory access patterns can help detect exploitation attempts. Network segmentation and limiting administrative privileges on macOS endpoints will reduce the attack surface. Regularly auditing installed applications and conducting vulnerability assessments on macOS devices will further enhance security posture. Additionally, educating users about the risks of installing unverified software can help prevent exploitation. Organizations should also monitor threat intelligence feeds for emerging exploits related to CVE-2025-24256 to respond promptly.