CVE-2024-27842 is a kernel privilege escalation vulnerability in Apple macOS, fixed in version Sonoma 14.5. The vulnerability arises from inadequate validation within the kernel, allowing a local application to execute arbitrary code with kernel-level privileges. This means an attacker with local access can potentially bypass security boundaries, gaining full control over the operating system kernel. The vulnerability is classified under CWE-358, indicating issues related to insufficiently protected privileged code execution. The CVSS v3.1 score is 8.1, reflecting a high severity due to the potential for complete system compromise. The attack vector is local (AV:L), with high attack complexity (AC:H), no privileges required (PR:N), and no user interaction needed (UI:N). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H). Although no exploits are currently known in the wild, the vulnerability poses a significant risk if weaponized. The fix involves improved kernel checks to prevent unauthorized code execution. This vulnerability is critical for macOS users, especially in environments where local access might be possible, such as shared or multi-user systems.

If exploited, this vulnerability allows an attacker to execute arbitrary code with kernel privileges, effectively gaining full control over the affected macOS system. This compromises the confidentiality of all data on the device, the integrity of the operating system and applications, and the availability of the system itself. Attackers could install persistent malware, bypass security controls, access sensitive information, or disrupt system operations. Organizations relying on macOS for critical tasks or handling sensitive information face risks of data breaches, espionage, and operational disruption. The local attack vector limits remote exploitation but does not eliminate risk in environments with multiple users or where attackers can gain physical or local access. The high attack complexity reduces the likelihood of widespread exploitation but does not negate the severe consequences if exploited. The absence of known exploits in the wild currently reduces immediate threat but patching remains urgent to prevent future attacks.

Organizations should immediately update all affected macOS systems to version Sonoma 14.5 or later, where the vulnerability is patched. Restrict local access to macOS devices by enforcing strong physical security controls and limiting user privileges. Employ endpoint detection and response (EDR) solutions to monitor for suspicious local activity indicative of privilege escalation attempts. Regularly audit and harden macOS configurations to minimize attack surface, including disabling unnecessary services and applications. Educate users about the risks of running untrusted local applications and enforce application whitelisting where feasible. Implement multi-factor authentication and strong access controls to reduce the risk of unauthorized local access. Maintain up-to-date backups to recover from potential system compromise. Monitor security advisories from Apple and threat intelligence sources for any emerging exploit reports related to this CVE.