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Windows 11 23H2 Windows 11 23H2 Security update
Patch Tuesday

KB5034123

KB5034123: Cumulative update for Windows 11, version 23H2, January 2024. Dynamic lock-screen weather arrives; spellchecker issue addressed

In short

The update adds interactive weather to the lock screen over the coming weeks and addresses a spellchecker issue. It also fixes connection problems for some Wi-Fi adapters and includes 35 security fixes, including two critical vulnerabilities.

Does it affect you? Applies to: Devices running Windows 11, versions 22H2 and 23H2. The Wi-Fi issue concerns some adapters and networks; the BitLocker reporting issue listed below concerns managed environments.

Build
22631.3007
Security
35 fixed · 2 critical
Restart
Required

What changes

Fixes 3 changes

Spellchecker

  • The update addresses an issue that affects the spellchecker.1

ActiveX scroll bar

  • The ActiveX scroll bar works in IE mode again.2

Wi-Fi

  • The update addresses a problem that might prevent some Wi-Fi adapters from connecting to some networks.3
    The issue is more likely on Wi-Fi networks that use 802.1x authentication and is unlikely on home networks. It might occur after installing KB5032288 or KB5033375.

Improvements 2 changes

Windows 11, version 23H2

  • This build includes all the improvements in Windows 11, version 22H2.4

Servicing stack

  • The component that installs Windows updates receives quality improvements to help devices receive and install Microsoft updates reliably.5
    The servicing stack update is for versions 22621.2567 and 22631.2567.

New feature 1 change

Lock screen

Gradual rollout
  • Interactive weather updates appear on the lock screen over the coming weeks. Hover over the weather for more information; selecting the weather card opens the full forecast in Microsoft Edge after you sign in. If Lock screen status is set to “None,” the new experience is on by default.6
    If Weather is already selected under Settings > Personalization > lock screen > Lock screen status, no action is needed.

Known issues

  1. Resolved Affects: Everyone

    Windows devices using more than one (1) monitor might experience issues with desktop icons moving unexpectedly between monitors or other icon alignment issues when attempting to use Copilot in Window…

    On devices using more than one monitor, desktop icons might move unexpectedly or become misaligned when using Copilot in Windows (preview). The issue is addressed on the service side for versions 22H2 and 23H2 on devices with updates released January 9, 2024, or later. Managed devices used in a multimonitor configuration do not yet have Copilot for Windows available.7

    Resolution Resolved

    Microsoft has resolved this issue in a subsequent update. No manual workaround is required after updating.

  2. Resolved Affects: Organizations and IT administrators Resolved by KB5034204

    Using the FixedDrivesEncryptionType or [SystemDrivesEncryptionType](https://nam06.safelinks.protec…

    In some managed environments, the “Require Device Encryption” setting might incorrectly show error 65000 when BitLocker policies require full encryption or used-space-only encryption. This is a reporting issue only and does not affect drive encryption. KB5034204 addresses the issue.8

    Resolution Fixed in KB5034204

    Install KB5034204 (or a later cumulative update) on affected devices. No manual workaround is required after updating.

  3. Resolved Affects: Everyone Resolved by KB5034204

    The color font format for COLRv1 does not render properly.

    The COLRv1 color font format might not render properly, affecting emoji with a 3D-like appearance. KB5034204 addresses the issue.9

    Resolution Fixed in KB5034204

    Install KB5034204 (or a later cumulative update) on affected devices. No manual workaround is required after updating.

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2024-01-09
Classification
Security Updates
Type
Cumulative update
Restart
Required
Replaced by
KB5034765
VersionBuildChannel
23H2 22631.3007 General availability

Security

35 vulnerabilities fixed
2 critical 33 important
VulnerabilitySeverityCVSS
CVE-2024-20674
Windows Kerberos Security Feature Bypass Vulnerability
 Critical 8.8
CVE-2024-20700
Windows Hyper-V Remote Code Execution Vulnerability
 Critical 7.5

The table lists the 2 exploited, publicly disclosed or critical vulnerabilities. See all 35 vulnerabilities →

Sources

Updated
Cited passages from Microsoft's official notes (9)
  1. 1. This update addresses an issue that affects the spellchecker. support.microsoft.com
  2. 2. This update addresses an issue that affects the ActiveX scroll bar. It does not work in IE mode. support.microsoft.com
  3. 3. This update addresses a known issue that might affect some Wi-Fi adapters. They might not connect to some networks. support.microsoft.com
  4. 4. This build includes all the improvements in Windows 11, version 22H2. support.microsoft.com
  5. 5. This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. support.microsoft.com
  6. 6. The coming weeks will bring a richer weather experience to your lock screen. This includes dynamic, interactive weather updates. support.microsoft.com
  7. 7. This issue is addressed on the service-side for Windows 11, versions 22H2 and 23H2 on devices with updates released January 9, 2024, or later. support.microsoft.com
  8. 8. This issue is a reporting issue only and does not affect drive encryption or the reporting of other issues on the device, including other BitLocker issues. support.microsoft.com
  9. 9. This issue is addressed in KB5034204. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 9 quoted passages · compared with Microsoft's page on Oct 20, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 5/5, clarity 5/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake