CVE-2022-22674: Apple macOS Out-of-Bounds Read Vulnerability

CVE-2022-22674 is an out-of-bounds read vulnerability in Apple macOS that can allow a malicious application to read kernel memory. It matters because kernel memory often holds sensitive system state; unauthorized reads can aid further compromise, privilege escalation, or information theft on affected Macs. Public detail is limited to the CISA summary that macOS Monterey is impacted; teams should treat any unpatched Monterey systems as in scope until the vendor advisory is checked.

How it works

The weakness is classified under CWE-125 (out-of-bounds read) and CWE-20 (improper input validation). In this class of flaw, software fails to properly validate bounds or input before reading memory. An attacker who can run an application on the system may craft input or trigger a code path that causes the kernel (or a kernel-facing component) to read past the end of an intended buffer. The result is disclosure of adjacent kernel memory contents to the unprivileged application. Exact trigger conditions, components, and exploitation mechanics are not detailed in the provided facts; confirm those against the Apple security advisory for this CVE.

Am I affected? How to find it in your systems

This vulnerability affects Apple macOS, specifically called out for Monterey in the CISA summary. macOS commonly runs on Mac desktops, laptops, and some servers or virtual machines in enterprise environments.

• Inventory all Apple hardware and VMs running macOS; record the exact OS version via System Settings / About This Mac, or via MDM/inventory tools (Jamf, Kandji, Intune, osquery, etc.).
• Flag any systems identified as Monterey or otherwise listed as vulnerable in the current Apple advisory; do not rely on version guesses—confirm the fixed builds against the vendor release notes.
• Check configuration management databases and endpoint management consoles for unpatched Monterey installations, including lab, kiosk, and developer machines that may lag behind production.
• Telemetry signs of exploitation are not specified in the facts. In general for kernel out-of-bounds reads, look for unexpected process crashes, kernel panics, or anomalous application behavior accessing privileged interfaces; correlate with EDR alerts for unsigned or suspicious local applications. Absence of clear indicators does not mean the system is clean.

How to remediate

Patch first. Apply the macOS security updates that Apple issued for this vulnerability, following the vendor instructions referenced by CISA. Use your standard update channels (Software Update, MDM-enforced policies, or Apple Business Manager workflows) and verify installation of the fixed build on every managed Mac.

• Prioritize internet-facing, shared, or high-privilege systems, then roll out to the rest of the fleet.
• After patching, re-inventory to confirm no residual vulnerable Monterey instances remain.
• For this weakness class, also enforce least privilege: restrict which users can install or run untrusted applications, enable Gatekeeper and notarization checks, and keep System Integrity Protection and other platform hardening features enabled.
• Review and tighten application allow-listing where feasible so only approved binaries can execute.

If you can't patch immediately

Compensating controls reduce but do not eliminate risk until the vendor update is applied.

• Segment affected Macs from sensitive networks and limit their ability to reach critical servers or data stores.
• Enforce strong application control and block execution of untrusted or newly introduced binaries; remove local admin rights where possible.
• If a host-based or network virtual-patching capability exists for macOS kernel issues, evaluate it against the vendor advisory—do not assume generic WAF rules cover this local flaw.
• Increase monitoring: forward unified logs and EDR telemetry to a SIEM, alert on unusual process-to-kernel interactions or crashes, and watch for post-exploitation behaviors such as credential access or lateral movement.
• Disable or restrict any non-essential features or third-party software that broaden the local attack surface until patching is complete.

If your data may have been exposed

Actively exploited vulnerabilities can lead to broader compromise and data exposure even when ransomware use is not documented for this CVE. If you suspect systems were vulnerable and reachable by untrusted applications, treat the incident as a potential breach: isolate hosts, preserve logs, and follow your incident-response process. You can run a free exposure scan of your email addresses against known breach data to check whether credentials or personal information have already appeared in public dumps, then force password resets and enable multi-factor authentication where relevant.