CVE-2025-24157 is a buffer overflow vulnerability in Apple macOS kernel memory handling, specifically addressed in macOS Sequoia 15.4, Sonoma 14.7.5, and Ventura 13.7.5. The vulnerability stems from improper bounds checking or memory management that allows an application to write beyond allocated buffers, leading to corruption of kernel memory or unexpected system termination (crashes). This type of vulnerability is classified under CWE-120, which involves classic buffer overflow issues that can compromise system stability and security. The vulnerability can be exploited remotely over the network without requiring privileges or user interaction, but the attack complexity is high, indicating that exploitation requires detailed knowledge and precise conditions. The impact includes potential denial of service through system crashes or kernel memory corruption, which could destabilize the operating system or cause data loss. No public exploits are known at this time, but the risk remains significant due to the critical nature of kernel memory corruption. Apple has fixed this issue by improving memory handling in the affected macOS versions, and users are advised to update promptly. The CVSS v3.1 base score is 5.6, reflecting medium severity with low confidentiality and integrity impact but low to medium availability impact.

The primary impact of CVE-2025-24157 is on system availability and stability. An attacker could exploit this vulnerability to cause unexpected system termination (kernel panics) or corrupt kernel memory, potentially leading to denial of service conditions. While the confidentiality and integrity impacts are rated low, kernel memory corruption could theoretically be leveraged for privilege escalation or further attacks if combined with other vulnerabilities. Organizations relying on affected macOS versions may experience system outages or instability, disrupting business operations, especially in environments with critical macOS infrastructure or services. The vulnerability does not require user interaction or privileges, increasing the risk of remote exploitation. However, the high attack complexity somewhat limits widespread exploitation. Still, unpatched systems remain vulnerable to targeted attacks or accidental crashes caused by malicious or malformed applications.

To mitigate CVE-2025-24157, organizations should immediately apply the security updates released by Apple for macOS Sequoia 15.4, Sonoma 14.7.5, and Ventura 13.7.5 or later. Beyond patching, organizations should implement application whitelisting to restrict untrusted or unknown applications from executing, reducing the risk of malicious apps triggering the vulnerability. Employing endpoint detection and response (EDR) solutions can help detect anomalous behavior indicative of exploitation attempts or kernel instability. Network segmentation and limiting exposure of macOS systems to untrusted networks can reduce attack surface. Regularly auditing installed applications and removing unnecessary software can minimize the chance of vulnerable or malicious apps running. Monitoring system logs for kernel panics or unusual crashes may provide early warning signs of exploitation attempts. Finally, educating users about the risks of installing untrusted software can help prevent accidental triggering of the vulnerability.