One of Microsoft’s biggest Windows 11 updates yet brought a massive number of security flaw fixes

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One of

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’s biggest Windows 11 updates yet brought a massive number of security flaw fixes

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has issued a mammoth Windows 11 update that brings fixes for around 150 security flaws in the operating system, as well as fixes for 67 Remote Code ********** (RCE) vulnerabilities. RCEs enable malicious actors to deploy their code to a target device remotely, often being able to do so without a person’s consent or knowledge – so this is a Windows 11 update you definitely want to install ASAP. 

This update was rolled out on

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’s Patch Tuesday (the second Tuesday of every month), a monthly update when

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releases security updates. 

Three of these were classed as ‘critical’ vulnerabilities, meaning that

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saw them as posing a particularly hefty risk to users.

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, more than half of the RCE vulnerabilities were found in

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SQL drivers; essential software components that facilitate communication between

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apps and its servers, leading to speculation that the SQL drivers share a common flaw that is being exploited by malicious users. 

The three vulnerabilities classed as ‘critical’ had to do with Windows Defender, ironically an app designed by

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to protect users from online threats. 

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A possibly record-setting update

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that this security update sets a record for the number of Windows 11 issues addressed, making it the largest update

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has released this year (so far) and the largest released since 2017. 

The number of bugs is broken down as follows:

• 31 Elevation of Privilege Vulnerabilities
• 29 Security Feature Bypass Vulnerabilities
• 67 Remote Code ********** Vulnerabilities
• 13 Information Disclosure Vulnerabilities
• 7 Denial of Service Vulnerabilities
• 3 Spoofing Vulnerabilities

These spanned across several apps and functionalities, including

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Office apps, Bitlocker, Windows Defender, Azure, and more. 

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Two zero-day loopholes that were cause for concern

Two zero-day vulnerabilities were also addressed by

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in April’s Patch Tuesday update, and apparently, they have been exploited in malware attacks. Zero-day vulnerabilities are flaws in software that potentially harmful actors find and possibly exploit before the software’s developers discover it. The zero refers to the proverbial buffer of time that developers have in terms of urgency to develop a patch to address the issue. 

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hasn’t said whether the zero-day flaws were being actively exploited, but this information was shared by Sophos (a software and hardware company) and Trend Micro (a cybersecurity platform). 

One of these has been labeled

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by

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, and it’s been classed as a Proxy Drive Spoofing Vulnerability. The other,

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, was classed as a SmartScreen Prompt Security Feature Bypass Vulnerability.

You can see the full list of vulnerabilities in

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. Mashable points to the fact that Windows necessitates such a vast number of patches and changes because Windows is used as the operating system on different manufacturers’ machines and has to constantly keep up with accommodating a variety of hardware configurations.   

Some users might find Windows 11’s need for frequent updates annoying, which could lead them to consider alternative operating systems like macOS. If you’re sticking with Windows 11, KrebsonSecurity recommends that you back up your computer’s data before installing the update. I’m glad

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continues to address bugs and security risks in Windows 11, even if that does mean we’re nagged to update the OS more than some of its competitors, and I would urge users to make sure that they install this update, which you can do through Windows Update if your PC hasn’t started this process already. 

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