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Windows 11 has a new KB5009566 patch to fix vulnerability issues
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Updated onOctober 4, 2023
updated onOctober 4, 2023
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Key notes
Microsoft has issued the new KB5009566 patch for Windows 11 including mostly security updates but also improvements and fixes.
It’s important to know that this is a mandatory update that addresses the CVE-2022-21889 Windows IKE Extension Denial of Service vulnerability.
According to theMicrosoft report, the KB5009566 features the following highlights:
We remind you thatsecurity updates are extremely importantto protect your system integrity and data.
What are the improvements and fixes of KB5009566 for Windows 11?
The KB5009566 SSU mainly addresses security issues but it also fixes a problem with theJapanese Input Method Editors (IME).
It seems thatwhen you use a Japanese IME to enter text, the cursor moves in an unexpected manner and the text might appear out of order.
However, this may appearin apps that use themultibyte character set (MBCS).That includesMicrosoft Japanese IME and third-party Japanese IMEs.
What are the known issues for KB5009566?
Unfortunately, this patch can also bring some bugs along. For instance, you may notice color rendering issues in image editing programs or on high dynamic range (HDR) displays.
Apparently, the problem affects the white colors that could be displayed as bright yellow or other colors.
According to Microsoft, the issue occurs when some color-rendering Win32 APIs return unexpected information or errors under certain conditions.
However, this won’t affect all the color profile management programs from Windows 11. The Microsoft Color Control Panel should work correctly.
The software giant doesn’t have a solution right now but it promises to provide a fix by the end of the month.
If you can’t find the new patch in the Windows Update section from Settings, you maydownload it manually from the Microsoft Update Catalog.
For additional information, you shouldconsult our article on how does Patch Tuesday workand secure your system and data.
Should you have installed the update already and encountered any other issues, tell us all about them in the comments section and we will try to help.
More about the topics:patch tuesday,Windows 11
Claudiu Andone
Windows Toubleshooting Expert
Oldtimer in the tech and science press, Claudiu is focused on whatever comes new from Microsoft.
His abrupt interest in computers started when he saw the first Home Computer as a kid. However, his passion for Windows and everything related became obvious when he became a sys admin in a computer science high school.
With 14 years of experience in writing about everything there is to know about science and technology, Claudiu also likes rock music, chilling in the garden, and Star Wars. May the force be with you, always!
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Claudiu Andone
Windows Toubleshooting Expert
Oldtimer in the tech and science press, with 14 years of experience in writing on everything there is to know about science, technology, and Microsoft
