CVE-2024-21640: OOB Access in CefVideoConsumerOSR::OnFrameCaptured

Severity: critical (CVSS 9.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-01-13 · updated 2026-06-17
Weakness: CWE-125

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.

Affected products

chromiumembedded Chromium Embedded Framework: before 2024-01-05 — fixed in 2024-01-05

How to fix

Upgrade to a fixed version: chromiumembedded Chromium Embedded Framework 2024-01-05. Check the vendor advisory for mitigations.

References

https://github.com/chromiumembedded/cef/commit/1f55d2e12f62cfdfbf9da6968fde2f928982670b
https://github.com/chromiumembedded/cef/security/advisories/GHSA-3h3j-38xq-v7hh
https://github.com/chromiumembedded/cef/commit/1f55d2e12f62cfdfbf9da6968fde2f928982670b
https://github.com/chromiumembedded/cef/security/advisories/GHSA-3h3j-38xq-v7hh

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