CVE-2025-24155 is a medium-severity vulnerability affecting Apple macOS operating systems, specifically versions prior to macOS Sequoia 15.3, macOS Ventura 13.7.6, and macOS Sonoma 14.7.6. The vulnerability arises from improper memory handling that allows a local application to disclose kernel memory contents. Kernel memory disclosure vulnerabilities fall under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) and can lead to leakage of sensitive information stored in kernel space, such as cryptographic keys, passwords, or other critical system data. The CVSS 3.1 base score of 5.5 reflects a scenario where the attacker requires local access (Attack Vector: Local), low attack complexity, no privileges required, but user interaction is necessary to trigger the vulnerability. The scope is unchanged, meaning the vulnerability affects the same security authority. While the vulnerability does not allow modification or disruption of system integrity or availability, the confidentiality impact is high due to potential exposure of sensitive kernel memory. No known exploits are currently reported in the wild, and Apple has addressed the issue by improving memory handling in the specified patched macOS versions. Given the nature of macOS as a widely used platform in enterprise and personal environments, this vulnerability could be leveraged by malicious local applications or attackers with limited access to escalate information gathering capabilities on affected systems.

For European organizations, the impact of CVE-2025-24155 primarily concerns confidentiality breaches on macOS endpoints. Organizations using macOS devices—particularly in sectors handling sensitive data such as finance, government, healthcare, and technology—could face risks of sensitive kernel memory disclosure if devices remain unpatched. This could facilitate further attacks by revealing kernel-level secrets that might aid privilege escalation or bypass security controls. Although exploitation requires local access and user interaction, insider threats or malware delivered via phishing or social engineering could exploit this vulnerability. The impact is heightened in environments with mixed OS deployments where macOS devices are used for critical operations. Data protection regulations such as GDPR impose strict requirements on safeguarding personal and sensitive data, so any leakage could lead to compliance issues and reputational damage. However, the lack of known active exploits and the availability of patches mitigate the immediate risk if organizations apply updates promptly.

European organizations should prioritize deploying the macOS updates macOS Sequoia 15.3, Ventura 13.7.6, or Sonoma 14.7.6 to all vulnerable devices. Beyond patching, organizations should enforce strict endpoint security policies including application whitelisting to prevent untrusted apps from executing, and implement least privilege principles to limit user permissions and reduce the risk of local exploitation. User education on phishing and social engineering can reduce the likelihood of triggering user interaction-based exploits. Employing endpoint detection and response (EDR) solutions with behavioral analytics can help detect suspicious local activity indicative of exploitation attempts. Network segmentation and limiting physical and remote access to macOS devices can further reduce exposure. Regular auditing of installed software and monitoring for unusual kernel memory access patterns can provide early warning signs. Finally, organizations should maintain an up-to-date asset inventory of macOS devices to ensure timely patch management and vulnerability remediation.