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CISA KEV · ACTIVELY EXPLOITED
MEDIUM severity

CVE-2022-22674

MEDIUM

CVE-2022-22674 is a medium-severity (CVSS 5.5) Out-of-bounds Read vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2022-04-04) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

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…

Published
Updated
Affected
2 products
Patched
See advisory
Exploits
2 known
Exploitation data as of Oct 24, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2022-04-04. Federal agencies were required to remediate by 2022-04-25.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2022-22674.

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk-0.05%
Lower risk than most CVEs65th percentile — riskier than 65% of all scored CVEsHighest risk
0.00%0.54%1.09%1.63%0.2%1.1%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2022-22674 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 395,249 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

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.

Affected Products

2 products · 18 configurations
OS
mac os xapple
≥ 10.15 && < 10.15.7
1 version
10.15.7
OS
macosapple
≥ 12.0.0 && < 12.3.1
range
Exploits & PoCs
2

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

An out-of-bounds read issue existed that led to the disclosure of kernel…

support.apple.comGoogle-sheetMar 2022

An out-of-bounds read issue existed that led to the disclosure of kernel…

cisa.govCISAApr 2022

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    No fixed release is recorded for CVE-2022-22674 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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CVE-2022-22674: Memory Corruption (Medium 5.5, KEV)