Apple macOS Kernel Out-of-Bounds Read Vulnerability (CVE-2022-22674) Analysis and Mitigation Guide
Executive & SecOps Summary
SECOPS ASSESSMENTmacOS Monterey prior to 12.3.1, macOS Big Sur prior to 11.6.6, and macOS Catalina prior to Security Update 2022-004.
A local attacker can exploit this vulnerability to read sensitive kernel memory, potentially leading to the disclosure of cryptographic keys, system credentials, or memory layouts.
Immediately apply the official security updates provided by Apple (macOS Monterey 12.3.1, Big Sur 11.6.6, or Security Update 2022-004 Catalina).
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Open the terminal on your macOS device and execute the following commands to download and install the latest security updates.
# List all available software updates
softwareupdate -l
# Download and install all updates, then restart the system
sudo softwareupdate -i -a --restart2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, restrict local terminal access and disable guest accounts via MDM or terminal commands to minimize the attack surface.
# Disable the Guest Account to prevent unauthorized local access
sudo defaults write /Library/Preferences/com.apple.loginwindow GuestEnabled -bool NO3. Log Audit & IoC Verification Commands
Use the following commands to verify the current macOS version and inspect system logs for potential kernel anomalies.
# Verify the current macOS version and build number
sw_vers
# Query system logs for kernel-related anomalies or panic events
log show --predicate 'process == "kernel"' --info | grep -E -i 'out-of-bounds|panic|memory-disclosure' | tail -n 50Block Kernel Privilege Escalation & Ransomware Payloads Before You Can Reboot
Protect unpatched Windows, Linux, and macOS workloads against in-memory exploitation and lateral movement with autonomous EDR.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2022-22674) is an out-of-bounds read issue (CWE-125) residing within the macOS kernel. The root cause is insufficient input validation when the kernel processes parameters passed from user space. Due to this lack of boundary checks, the kernel can be coerced into reading memory addresses outside the allocated buffer.
2. Exploitation Mechanics & Attack Scenario
A local attacker with standard user privileges can craft malicious system calls or API requests targeting the vulnerable kernel subsystem. Because the kernel fails to validate the bounds of the requested offset, it reads and returns data from adjacent kernel memory spaces. This allows the attacker to bypass Kernel Address Space Layout Randomization (KASLR) or extract sensitive data belonging to other processes.
3. Infrastructure & Business Impact
As this vulnerability is listed in the CISA KEV catalog, it has been actively exploited in the wild. Kernel memory disclosure is highly critical because it serves as a prerequisite for local privilege escalation (LPE) exploits. Compromising an employee's macOS workstation can lead to credential theft, lateral movement within corporate networks, and unauthorized access to sensitive business assets.
Official Vendor Advisories & References
An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Monterey 12.3.1, Security Update 2022-004 Catalina, macOS Big Sur 11.6.6. A local user may be able to read kernel memory.
Frequently Asked SecOps Questions (CVE-2022-22674)
FAQQ1. How critical is CVE-2022-22674 and is it actively exploited in the wild?
CVE-2022-22674 is rated CVSS 5.5 (MEDIUM) with a 30-day EPSS exploitation probability of 1.1%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2022-22674?
Primary impacted vendors include apple across macos, macos_monterey, macos_big_sur, macos_catalina. Scope summary: macOS Monterey < 12.3.1, macOS Big Sur < 11.6.6, macOS Catalina prior to Security Update 2022-004
Q3. What temporary mitigations or workarounds exist for CVE-2022-22674 before patching?
[Mitigation] Immediately apply the official security updates provided by Apple (macOS Monterey 12.3.1, Big Sur 11.6.6, or Security Update 2022-004 Catalina). Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2022-22674
Instantly format this advisory into an executive CISO summary or engineering patch ticket.
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