CVE-2025-31272: macOS Launch Constraint Bypass and Local Privilege Escalation

Technical summary

CVE-2025-31272 is a privilege escalation vulnerability stemming from insufficient validation of launch constraints on macOS. Launch constraints are OS-level controls that restrict how and when applications can execute privileged operations. The vulnerability, classified under CWE-269 (Improper Access Control), permits a locally authenticated process to bypass these protections through crafted execution requests. The flaw was resolved by implementing more rigorous constraint validation logic. The CVSS 3.1 score of 7.8 (HIGH) reflects a local attack vector requiring user-level privileges, but with high potential impact across confidentiality, integrity, and availability.

Business impact

Organizations running affected macOS systems face elevated risk of local privilege escalation attacks. Malicious or compromised applications could gain system-level access, potentially leading to data exfiltration, installation of persistence mechanisms, or lateral movement within the network. The impact is most severe in environments where users with standard privileges run untrusted or supply-chain-compromised applications. Enterprises relying on macOS as their primary platform should prioritize patch deployment to maintain security posture.

Affected systems

macOS systems running versions prior to Sequoia 15.4 are affected. This includes all earlier versions of macOS Sequoia (15.0 through 15.3) and potentially other recent macOS releases depending on Apple's backport decisions. Organizations should verify compatibility with their specific macOS deployment version and check Apple's security advisory for any backported patches to earlier OS lines.

Exploitability

Exploitation requires local system access (CWE-269 improper access control) and an application or process running with user-level privileges. The attack does not require user interaction, making it suitable for automated malware delivery or post-compromise lateral movement. While the barrier to initial exploitation is moderate—requiring local code execution—the outcome is severe. The vulnerability is not listed on the CISA Known Exploited Vulnerabilities catalog as of the latest update, but given the relatively low complexity and high impact, detection of proof-of-concept code or active exploitation attempts should be expected.

Remediation

Patch to macOS Sequoia 15.4 or later as soon as possible. Before patching, mitigate risk by restricting user-level application execution, disabling unnecessary elevated-privilege services, and monitoring for unusual privilege escalation attempts. Verify that your environment supports macOS Sequoia; users on older macOS versions should check whether Apple has released security updates for their specific OS line and apply them accordingly.

Patch guidance

Apple released the fix in macOS Sequoia 15.4. Navigate to System Settings > General > Software Update and install the latest available update. For managed environments, use your mobile device management (MDM) or software deployment tools to enforce installation. If your organization is on an earlier macOS version (Big Sur, Monterey, Ventura, Sonoma), verify Apple's official security advisory to confirm whether patches have been backported, and apply those updates if available. Test patches in a non-production environment first to ensure compatibility with organizational applications and workflows.

Detection guidance

Monitor system logs and security tools for privilege escalation attempts originating from user-level processes. Watch for repeated failures or successes in launching protected system daemons or services. Endpoint Detection and Response (EDR) solutions should flag abnormal elevation requests from unsigned or untrusted applications. Network-level detection is limited since the attack is entirely local; focus on behavioral monitoring. If available, enable audit logging for system call sequences related to process spawning and privilege transitions. Review application whitelisting policies to prevent unauthorized executables from attempting privilege escalation.

Why prioritize this

This vulnerability merits high priority because it enables local privilege escalation—a critical step in attack chains that can lead to full system compromise. The CVSS score of 7.8 reflects high severity, and the ease of exploitation (local, no user interaction required) makes it attractive to attackers. While it currently lacks a CISA KEV listing, the combination of low attack complexity and severe impact justifies immediate patching. Organizations should rank this alongside other privilege escalation flaws in their patch management schedules.

Risk score, explained

The CVSS 3.1 score of 7.8 (HIGH) is driven by a local attack vector (AV:L), low attack complexity (AC:L), and the requirement for low privileges (PR:L), combined with high impact across confidentiality, integrity, and availability (C:H/I:H/A:H). The scope is unchanged (S:U), meaning the vulnerability does not affect resources outside the vulnerable component. This score accurately reflects the serious nature of privilege escalation: once an attacker executes code locally with user-level rights, the vulnerability provides a direct path to system-level control without additional user interaction.

Frequently asked questions