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How to Fix CVE-2022-4262- A Type Confusion bug in the V8 JavaScript Engine in Chrome

Google has published a security advisory against a new, high-severity type confusion bug in the V8 JavaScript Engine in Chrome. The vulnerability, tracked as CVE-2022-4262, is a high-severity vulnerability that persists in the V8 JavaScript Engine in Chrome. Since this allows remote attackers to exploit heap corruption via a crafted HTML page potentially. All Chrome users need to fix this vulnerability before they face any issues. We created this post to show you how to Fix CVE-2022-4262- a high-severity type confusion bug in the V8 JavaScript Engine in Chrome.

Summary of CVE-2022-4262

According to Clement Lecigne, the discloser of the flaw, this is a type confusion bug in the V8 JavaScript Engine that allows remote attackers to exploit heap corruption via a crafted HTML page potentially. The flaw is determined as high in severity with a base score of 8.8 on the CVSS scale. A remote attacker could weaponize the flaw to perform out-of-bounds memory access, arbitrary code execution, or even crash the victim system.

Associated CVE IDCVE-2022-4262
DescriptionA Type Confusion bug in the V8 JavaScript Engine in Chrome
Associated ZDI ID
CVSS Score8.8 High
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score
Exploitability Score
Attack Vector (AV)Network
Attack Complexity (AC)Low
Privilege Required (PR)None
User Interaction (UI)Required
ScopeUnchanged
Confidentiality (C)High
Integrity (I)High
availability (a)High

As of now, we don’t have more details about the CVE-2022-4262 as Google restricted the technical details due to security reasons. And Google also says that it is aware of the existence of exploit in the wild. It would reveal the root cause of the vulnerability and its implications in the coming weeks when the majority of users are updated with a fix. At this time, we can only share how to Fix CVE-2022-4262- high-severity type confusion bug in the V8 JavaScript Engine in Chrome.

How to Fix CVE-2022-4262- A Type Confusion Bug in the V8 JavaScript Engine in Chrome?

Google has acknowledged this flaw by releasing a patch. Google recommends Chrome users update their Chrome to the fixed version to avoid any consequences.

The updated version released by Google is Chrome 108.0.5359.94/.95. Chrome users are advised to install the security update immediately on whatever OS they use, including Windows, Mac, and Linux. Mac and Linux users are required to update version 108.0.5359.94, and Windows users are required to update 108.0.5359.94/.95. 

More technical details about the attacks that can occur by exploiting this vulnerability are to be released by Google in the coming weeks. Until then, users must install the Chrome update to prevent threat actors from exploiting the flaw.

How to Upgrade Chrome Browser?

Chrome browser normally runs updates in the background when you close and then reopen your browser. However, if you haven’t done this for a while, a pending update might be available in a colored icon.

Different colors show how long it’s been since the update was released. The green color means an update was released less than two days ago. Follow the steps to update your Chrome browser to its latest version.

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Upgrading your Chrome browser is easy, and it only takes a few moments. Follow these steps to complete the upgrade:

  1. Open your Chrome browser and click on the three vertical dots in the top right of the window.
  2. Click on ‘Help‘, then select ‘About Google Chrome‘ from the drop-down menu. A new page will open with details about your current version of Chrome, including whether or not an update is available.
  3. If an update is available, you’ll see a button that says ‘Update Google Chrome’. Click this button to start downloading and installing the latest version of Google Chrome onto your computer.
  4. Once the upgrade process is complete, you’ll see a message telling you that your Chrome browser has been successfully updated. Click ‘Relaunch‘ to finish the update and open Chrome with all of the new features included in the latest version.

Time needed: 2 minutes

Steps to Upgrade Chrome Browser

Follow these steps to apply the patch.

  1. Launch the update on Chrome

    Open Chrome, and click on the three vertical dots in the top right of the window. Click on ‘Help’, then select ‘About Google Chrome’ from the drop-down menu. Chrome will start fetching the updates by its own if your computer is connected to the internet and an update is available.


    Launch the update on Chrome

  2. Relaunch the Browser

    Once the upgrade process is complete, you’ll see a message telling you that your Chrome browser has been successfully updated. Click ‘Relaunch‘ to finish the update.


    Relaunch the Browser

  3. Chrome is updated to the latest available patch

    Chrome is updated to v108.0.5359.95.


    Chrome is updated to the latest available patch

Now that you know how to upgrade your Chrome browser, you can enjoy all of the latest features of the world’s most popular web browser. Keeping your Chrome up to date is essential for staying secure and making sure you have access to all the newest tools, apps, and extensions.

Your browser will be updated to the latest version, which has fixed the issue. If you have deployed the offline installation package, you can manually download the updated version to upgrade your browser. We hope this post helped you how to Fix CVE-2022-4262- a high-severity type confusion bug in the V8 JavaScript Engine in Chrome.

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About the author

Arun KL

Arun KL is a cybersecurity professional with 15+ years of experience spanning IT infrastructure, cloud security, vulnerability management, Penetration Testing, security operations, and incident response. He is adept at designing and implementing robust security solutions to safeguard systems and data. Arun holds multiple industry certifications including CCNA, CCNA Security, RHCE, CEH, and AWS Security.

To know more about him, you can visit his profile on LinkedIn.

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