CVE-2021-4327

Name: CVE-2021-4327
Creator: NVD / NIST
Published: 2023-03-01T11:15:12.817+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2021-4327 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability was found in SerenityOS. It has been rated as critical. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

A vulnerability was found in SerenityOS. It has been rated as critical. Affected by this issue is the function initialize_typed_array_from_array_buffer in the library Userland/Libraries/LibJS/Runtime/TypedArray.cpp. The manipulation leads to integer overflow. The exploit has been disclosed to the public and may be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The patch is identified as f6c6047e49f1517778f5565681fb64750b14bf60. It is recommended to apply a patch to fix this issue. VDB-222074 is the identifier assigned to this vulnerability.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.93%

56.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Serenityos	Serenityos	< 2021-01-27

References

https://devcraft.io/2021/02/11/serenityos-writing-a-full-chain-exploit.htmlExploit, Third Party Advisory
https://github.com/SerenityOS/serenity/commit/f6c6047e49f1517778f5565681fb64750b14bf60Patch
https://vuldb.com/?ctiid.222074Permissions Required, Third Party Advisory
https://vuldb.com/?id.222074Permissions Required, Third Party Advisory
https://devcraft.io/2021/02/11/serenityos-writing-a-full-chain-exploit.htmlExploit, Third Party Advisory
https://github.com/SerenityOS/serenity/commit/f6c6047e49f1517778f5565681fb64750b14bf60Patch
https://vuldb.com/?ctiid.222074Permissions Required, Third Party Advisory
https://vuldb.com/?id.222074Permissions Required, Third Party Advisory

Timeline

Published: Mar 1, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4327?

How severe is CVE-2021-4327?

CVE-2021-4327 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4327?

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-2021-4327?

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

Scan your code now

Source: NVD / NIST