CVE-2024-54531 is a vulnerability identified in Apple macOS that enables an application to bypass Kernel Address Space Layout Randomization (kASLR). kASLR is a security feature designed to randomize the memory addresses used by the kernel, making it difficult for attackers to predict the location of critical code and data structures, thereby preventing certain types of exploits such as kernel-level code execution. This vulnerability arises from insufficient memory handling in the kernel, which allows a local application with limited privileges (requiring low privileges but no user interaction) to infer or bypass the randomized kernel memory layout. The flaw does not allow direct code execution or privilege escalation by itself but facilitates further exploitation by revealing kernel memory addresses, which can be leveraged in chained attacks. The issue was addressed in macOS Sequoia 15.2 by improving the kernel's memory management to prevent leakage or inference of kernel address space layout. The CVSS v3.1 score is 5.5, reflecting a medium severity with attack vector local, low attack complexity, low privileges required, no user interaction, unchanged scope, high confidentiality impact, and no impact on integrity or availability. No known exploits have been reported in the wild as of the publication date. This vulnerability primarily affects macOS systems running versions prior to Sequoia 15.2.

The primary impact of CVE-2024-54531 is on the confidentiality of macOS kernel memory layout. By bypassing kASLR, an attacker can gain knowledge of kernel memory addresses, which significantly lowers the barrier for further kernel-level exploits, such as privilege escalation or arbitrary code execution. While this vulnerability alone does not grant elevated privileges or disrupt system availability, it is a critical enabler for more severe attacks. Organizations relying on macOS devices, especially those handling sensitive data or operating in high-security environments, face increased risk if the vulnerability is exploited in combination with other flaws. The absence of known exploits in the wild reduces immediate risk but does not eliminate the potential for future attacks. The vulnerability's local attack vector means that attackers must have some level of access to the system, which could be through compromised user accounts or malicious applications. Therefore, the impact is significant in environments where local threat actors or malicious insiders exist. The vulnerability could also be leveraged in targeted attacks against high-value macOS users or organizations.

To mitigate CVE-2024-54531, organizations and users should promptly update all affected macOS systems to version Sequoia 15.2 or later, where the vulnerability is fixed. Beyond patching, organizations should enforce strict application control policies to limit the installation and execution of untrusted or unnecessary local applications that could exploit this vulnerability. Employing endpoint detection and response (EDR) solutions capable of monitoring for suspicious local privilege escalation attempts or unusual kernel memory access patterns can help detect exploitation attempts. Regularly auditing user privileges and minimizing the number of users with local access reduces the attack surface. Additionally, enabling system integrity protection (SIP) and other macOS security features can help prevent unauthorized kernel modifications. For environments where immediate patching is not feasible, isolating vulnerable systems and restricting local access can reduce risk. Finally, maintaining up-to-date threat intelligence feeds and monitoring for emerging exploit reports related to this CVE is recommended.