CVE-2026-20695 is a security vulnerability identified in Apple macOS operating systems that permits an application to disclose the kernel memory layout. The kernel memory layout is typically randomized using Kernel Address Space Layout Randomization (KASLR) to prevent attackers from reliably locating kernel code and data in memory, a critical defense against exploitation techniques such as privilege escalation and kernel-level code execution. This vulnerability stems from insufficient protections in the memory management subsystem, allowing an app to infer or directly determine the arrangement of kernel memory. The affected macOS versions include those prior to macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, and macOS Tahoe 26.4, where Apple has implemented fixes that improve memory management to block such information disclosure. While no public exploits have been reported, the ability to map kernel memory layout can be a stepping stone for attackers to bypass security controls and escalate privileges on the system. The vulnerability does not require user interaction or authentication, but it is limited to local applications running on the vulnerable macOS systems. This flaw highlights the importance of robust kernel memory protections and timely patching to maintain system integrity and security.

The primary impact of CVE-2026-20695 is information disclosure of the kernel memory layout, which can undermine the effectiveness of KASLR. By revealing kernel memory addresses, attackers can craft more reliable exploits to escalate privileges or execute arbitrary code at the kernel level, potentially gaining full control over the affected system. This can lead to severe consequences including data theft, system compromise, and persistence of advanced malware. Organizations relying on macOS for critical operations, especially those handling sensitive data or operating in high-security environments, face increased risk if systems remain unpatched. Although exploitation requires local access, insider threats or malware already running on the system could leverage this vulnerability to deepen their foothold. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, as attackers may develop exploits once the vulnerability details become widely known. Overall, the vulnerability poses a moderate to high risk depending on the environment and attacker capabilities.

To mitigate CVE-2026-20695, organizations and users should promptly apply the security updates released by Apple: macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, and macOS Tahoe 26.4 or later. Beyond patching, organizations should enforce the principle of least privilege to limit the number of users and applications with local execution rights, reducing the attack surface. Employing endpoint detection and response (EDR) solutions can help identify suspicious local activity that might attempt to exploit kernel memory disclosure. Regularly auditing installed software and restricting the execution of untrusted applications can further reduce risk. Monitoring for anomalous behavior indicative of privilege escalation attempts is also recommended. In environments where patching may be delayed, consider isolating vulnerable macOS systems or restricting access to trusted users only. Finally, maintaining up-to-date backups and incident response plans ensures preparedness in case of compromise.