What is the CVSS score of CVE-2024-21640?

CVE-2024-21640 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.2%.

Which versions of Chromium Embedded Framework are affected by CVE-2024-21640?

CVE-2024-21640 presents moderate security risk, a out-of-bounds read vulnerability rated CVSS 5.4. Exploitation could cause memory corruption or application crashes.. A patch is available.

Is there a public PoC exploit available for CVE-2024-21640?

Yes, a public proof-of-concept exploit is available for CVE-2024-21640. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2024-21640?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Chromium Embedded Framework CVE-2024-21640

MEDIUM

Out-of-bounds Read (CWE-125)

2024-01-13 security-advisories@github.com

Buffer Overflow Google Information Disclosure Chromium Embedded Framework Chrome

5.4

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:34 vuln.today

Patch released

Mar 28, 2026 - 19:34 nvd

Patch available

PoC Detected

Nov 21, 2024 - 08:54 vuln.today

Public exploit code

CVE Published

Jan 13, 2024 - 08:15 nvd

MEDIUM 5.4

DescriptionGitHub Advisory

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.

AnalysisAI

Chromium Embedded Framework (CEF) is a simple framework for embedding Chromium-based browsers in other applications.CefVideoConsumerOSR::OnFrameCaptured does not check pixel_format properly,. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. 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 include: Chromiumembedded Chromium Embedded Framework.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.

CVE-2024-21640 vulnerability details – vuln.today

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