CVE-2026-43771

7.1

Apple · macOS

A stack overflow vulnerability in Apple macOS allows a local application to trigger a denial of service condition due to insufficient input validation.

Executive summary

A stack overflow vulnerability in Apple macOS may allow a local application to cause a system denial of service, posing a risk to availability.

Vulnerability

This is a stack overflow vulnerability caused by improper input validation. An unauthenticated local attacker can trigger this flaw by executing a malicious application, which may lead to a denial of service or potential information disclosure.

Business impact

Successful exploitation of this vulnerability can lead to unexpected system crashes or service interruptions, negatively impacting business continuity and user productivity. While the attack requires local execution, the potential for service disruption justifies the high severity rating of 7.1, as it compromises the core availability of the affected workstations or servers.

Remediation

Immediate Action: Update all affected macOS systems to the versions specified by Apple, specifically Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6, to apply the necessary input validation patches.

Proactive Monitoring: Monitor system logs for recurring application crashes or unexpected kernel-level errors that may indicate attempts to trigger memory corruption vulnerabilities.

Compensating Controls: Implement strict endpoint application control policies to ensure that only authorized and trusted software can be executed, thereby limiting the attack surface for local exploits.

Exploitation status

Public Exploit Available: No

Analyst recommendation

Given that this vulnerability affects core operating system components, it is essential to prioritize the deployment of the provided security updates across the enterprise fleet. Administrators should schedule these updates during the next maintenance cycle to ensure system stability and mitigate the risk of denial of service attacks.

More Apple CVEs

Sources