CVE-2024-27815 is a vulnerability identified in Apple’s operating systems including iOS, iPadOS, macOS Sonoma, tvOS, visionOS, and watchOS. The root cause is an out-of-bounds write condition (CWE-787) due to inadequate input validation, which can lead to memory corruption. This flaw enables an application with certain privileges to execute arbitrary code at the kernel level, effectively granting it full control over the affected device’s operating system. The vulnerability requires the attacker to already have some level of privileges (PR:H), meaning the attacker must have elevated permissions on the device, but no user interaction is necessary to trigger the exploit once those privileges are obtained. The CVSS v3.1 base score is 5.9, reflecting medium severity, with high impact on confidentiality and integrity but no impact on availability. Apple has fixed this issue in the 17.5 and 10.5 updates of their respective platforms by improving input validation to prevent the out-of-bounds write. There are currently no known exploits in the wild, but the potential for kernel-level code execution makes this a significant risk if left unpatched. The vulnerability affects a broad range of Apple devices, including iPhones, iPads, Macs, Apple TVs, Apple Vision devices, and Apple Watches, highlighting the importance of timely patching across the Apple ecosystem.

If exploited, this vulnerability allows an attacker with elevated privileges to execute arbitrary code with kernel-level access, which can lead to full system compromise. This compromises the confidentiality and integrity of the device, enabling unauthorized access to sensitive data, bypassing security controls, and potentially installing persistent malware or rootkits. Although availability is not directly impacted, the attacker’s control over the kernel could indirectly disrupt system stability. The requirement for elevated privileges limits the initial attack vector, but once exploited, the attacker gains extensive control. Organizations relying on Apple devices for sensitive communications, data storage, or operational technology could face significant risks including data breaches, espionage, and disruption of services. The broad range of affected platforms increases the attack surface, especially in environments with mixed Apple device usage. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, as attackers may develop exploits targeting unpatched systems.

Organizations and users should immediately update all affected Apple devices to the latest versions: iOS 17.5, iPadOS 17.5, macOS Sonoma 14.5, tvOS 17.5, visionOS 1.2, and watchOS 10.5. Beyond patching, restrict app installation to trusted sources only, such as the Apple App Store, to reduce the risk of malicious apps gaining elevated privileges. Employ mobile device management (MDM) solutions to enforce update policies and monitor device compliance. Limit the number of users with elevated privileges on devices to reduce the attack surface. Conduct regular security audits and monitoring for unusual kernel-level activity or signs of compromise. For high-security environments, consider implementing runtime protections and kernel integrity monitoring tools where available. Educate users about the risks of privilege escalation vulnerabilities and the importance of timely updates. Finally, maintain backups and incident response plans tailored to Apple ecosystems to quickly recover from potential compromises.