Is CVE-2022-22674 (Apple macOS Out-of-Bounds Read) being exploited in the wild?

Yes. CISA added CVE-2022-22674 to its Known Exploited Vulnerabilities catalogue on 4 April 2022, which it does only when there is reliable evidence of active exploitation. CISA has not linked it to known ransomware campaigns. macOS Monterey contains an out-of-bounds read vulnerability that could allow an application to read kernel memory. Any organisation running the affected product should treat remediation as urgent.

How to interpret KEV status for an actively exploited macOS flaw

CISA KEV inclusion is the practical signal that matters here. For responders, it means the issue should be handled as an active exploitation event, not a routine vulnerability management item. The right question is whether the affected macOS estate is still exposed, whether the vulnerable code path is reachable in your environment, and whether any endpoints may already have been targeted.

Because the vulnerability is an out-of-bounds read in macOS Monterey, the operational concern is not just the presence of the product but the exposure of kernel memory to an application-level trigger. That makes asset scoping and exposure validation more important than a generic patch queue. Use the vendor advisory and CISA’s KEV catalogue to confirm the exact fix and any required mitigation steps.

What organisations should do first when exploitation is already confirmed

The immediate response is to treat this as urgent remediation on any in-scope Apple macOS Monterey system, especially where the device has higher trust, broader network reach, or access to sensitive data. Where patching is possible, prioritise the affected fleet ahead of lower-risk work. CISA’s Known Exploited Vulnerabilities Catalog is the authoritative place to confirm that the issue is being handled as a real-world exploitation case.

If you need a broader triage pattern, Zero-Day and Exploited Vulnerabilities Guide explains how to prioritise KEV-listed issues, accelerate mitigation, and structure post-patch verification. That matters here because exploitation status changes the response from routine hygiene to emergency containment.

When patching is delayed, reduce exposure by isolating the most exposed systems, restricting unneeded application execution, and increasing monitoring for abnormal process behaviour on those hosts. The issue is about preventing a trigger path from being reachable long enough for exploitation to occur again.

How to check for compromise and close the loop after remediation

For a flaw that can expose kernel memory, remediation alone is not enough if compromise may already have happened. Review endpoint telemetry, process creation history, crash logs, and any available EDR alerts for signs of suspicious execution on affected systems. Also look for unusual privilege use, persistence artefacts, or follow-on activity that could indicate the attacker used the flaw as an initial foothold.

Where the organisation lacks strong endpoint telemetry, preserve the affected host state before rebooting or reimaging if there is any realistic chance of forensic value. This is especially important when the asset handles sensitive workflows or has broad administrative reach. NIST National Vulnerability Database and CVE Program are useful references for keeping the vulnerability record, product identity, and remediation tracking aligned in your incident notes.

After the fix is deployed, verify that the vulnerable systems are no longer exposed and that your response record captures who was affected, when action was taken, and what evidence was reviewed. That closes the loop for both technical recovery and governance.

Risk and Threat Considerations

This kind of flaw matters because active exploitation changes the threat model. An out-of-bounds read can expose kernel memory, which may assist attackers in information disclosure, privilege escalation, or chaining into a broader compromise if the system is already being probed.

Failure mechanism: The attacker needs only a reachable code path in the affected macOS release, then uses the memory disclosure to reduce uncertainty about kernel state or adjacent security controls. If the host remains unpatched or insufficiently monitored, exploitation can be repeated across similarly configured endpoints.

Impact: The practical impact is elevated exposure for endpoints that are internet-facing, user-rich, or trusted inside the enterprise. In a mixed fleet, even one unremediated host can become a foothold for deeper access, so the main risk is not the CVE in isolation but the blast radius created by delayed response.

Standards & Framework Alignment

This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.

NIST CSF 2.0 and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.

Framework	Control / Reference	Relevance
NIST CSF 2.0	GV.RM-01 — Risk Management Strategy	Active exploitation requires risk-based prioritisation and exception handling.
	ID.RA-01 — Asset Vulnerabilities Are Identified and Managed	The question is about an exploited vulnerability and exposure confirmation.
Recommendation — Prioritise KEV-listed systems using risk-based remediation timelines. Identify affected macOS assets and verify vulnerability exposure.
NIST SP 800-53 Rev 5	RA-5 — Vulnerability Monitoring and Scanning	KEV-driven triage depends on identifying and tracking vulnerable hosts.
	SI-2 — Flaw Remediation	The answer centers on urgent remediation after confirmed exploitation.
	AU-6 — Audit Record Review, Analysis, and Reporting	Post-remediation compromise checks rely on reviewing security telemetry.
Recommendation — Continuously scan and track vulnerable macOS systems for remediation. Apply the vendor fix or mitigation as soon as exposure is confirmed. Review logs and alerts for signs of prior compromise on affected hosts.

Practitioner Guidance

What to prioritise: Start with asset confirmation, because you cannot triage an exploited vulnerability until you know exactly which macOS Monterey systems are present, reachable, and business critical. Then move to containment and patching before spending time on root-cause analysis.

What to verify: Confirm the host is in the affected product set, confirm the vendor fix is applied, and confirm the system has been checked for signs of prior compromise. If any of those three are missing, the case should remain open.

Decision rule: If you cannot patch immediately, treat the host as a higher-risk exception and apply compensating controls, then revisit it on a short timer. Do not leave it in a normal remediation queue once exploitation is known.

Practitioner takeaway: For KEV-listed issues, the key judgement is speed plus evidence, not patching alone, because active exploitation means you must assume both exposure and possible compromise until you have proved otherwise.