CVE-2024-21640

Name: CVE-2024-21640
Creator: NVD / NIST
Published: 2024-01-13T08:15:07.34+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.6/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2024-21640 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. Chromium Embedded Framework (CEF) is a simple framework for embedding Chromium-based browsers in other applications.`CefVideoConsumerOSR::OnFrameCaptured` does not check `pixel_format` properly, which leads to out-of-bounds read out of the sandbox. This vulnerability was patched in commit 1f55d2e. . EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

Chromium Embedded Framework (CEF) is a simple framework for embedding Chromium-based browsers in other applications.`CefVideoConsumerOSR::OnFrameCaptured` does not check `pixel_format` properly, which leads to out-of-bounds read out of the sandbox. This vulnerability was patched in commit 1f55d2e.

Metrics

CVSS 3.1

9.6/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H

EPSS Probability

0.55%

41.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Chromiumembedded	Chromium Embedded Framework	< 2024-01-05

References

https://github.com/chromiumembedded/cef/commit/1f55d2e12f62cfdfbf9da6968fde2f928982670bPatch
https://github.com/chromiumembedded/cef/security/advisories/GHSA-3h3j-38xq-v7hhExploit, Vendor Advisory
https://github.com/chromiumembedded/cef/commit/1f55d2e12f62cfdfbf9da6968fde2f928982670bPatch
https://github.com/chromiumembedded/cef/security/advisories/GHSA-3h3j-38xq-v7hhExploit, Vendor Advisory

Timeline

Published: Jan 13, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-21640?

How severe is CVE-2024-21640?

CVE-2024-21640 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2024-21640?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-21640?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST