{"family":"windowsserver","family_label":"Windows Server","build":"20348.5024","base":"20348","tag":"2022","kb":"KB5091575","kb_url":"https://support.microsoft.com/help/5091575","kb_title":"April 19, 2026—KB5091575 (OS Build 20348.5024) Out-of-band","release_date":"2026-04-19","update_type":"2026-04 OOB","update_type_label":"Out-of-band update","servicing":"LTSC","ms_known_issues":[{"title":null,"symptom":"Some devices with an unrecommended BitLocker Group Policy configuration might be required to enter their BitLocker recovery key on the first restart after installing this update. This issue only affects a limited number of systems in which ALL of the following conditions are true. These conditions are unlikely to be found on personal devices not managed by IT departments. BitLocker is enabled on the OS drive. The Group Policy \" Configure TPM platform validation profile for native UEFI firmware configurations \" is configured, and PCR7 is included in the validation profile (or the equivalent registry key is set manually). System Information ( msinfo32.exe ) reports Secure Boot State PCR7 Bindi","workaround":"Remove the Group Policy configuration before installing the update (Recommended) Open Group Policy Editor ( gpedit.msc ) or your Group Policy Management Console. Navigate to: Computer Configuration > Administrative Templates > Windows Components > BitLocker Drive Encryption > Operating System Drives . Set \" Configure TPM platform validation profile for native UEFI firmware configurations \" to \" Not Configured \". Run the following command on affected devices to propagate the policy change: gpupdate /force Run the following command to suspend BitLocker (where BitLocker is enabled on the C: drive): manage-bde -protectors -disable C: Run the following command to resume BitLocker (where BitLocker","applies_to":"","status":""}],"ms_none_known":false,"ms_highlights":null,"title":"April 19, 2026—KB5091575 (OS Build 20348.5024) Out-of-band","build_type":"release","channel_label":"Release","branch":null,"kind":"cumulative","kind_label":"Cumulative update","is_dotnet":false,"status":null,"line":{"status":"supported","note":"Supported LTSC release"},"created":1776600000,"created_iso":"2026-04-19T12:00:00Z","uuid":null,"permalink":"/builds/windowsserver/20348.5024/","tag_url":"/builds/windowsserver/2022/","index_url":"/builds/windowsserver/","api_url":"https://search.windowsforum.com/api/builds/build/windowsserver/20348.5024","records":[],"summary":null,"known_issues":[],"linked":{"news":[{"thread_id":414371,"node_id":4,"title":"KB5091157 April 2026 Out-of-Band Fix for Windows Server 2025 Reboot Loops","replies":2,"views":9142,"post_date":1776660063,"last_post_date":1776699696,"url":"https://windowsforum.com/news/kb5091157-april-2026-out-of-band-fix-for-windows-server-2025-reboot-loops.414371/","kind":"fix","match":"exact","pinned":true,"score":2.0},{"thread_id":414389,"node_id":4,"title":"KB5082063 LSASS Reboot Loops: Microsoft Out-of-Band Fixes for Server 2025/2022","replies":0,"views":875,"post_date":1776685276,"last_post_date":1776685276,"url":"https://windowsforum.com/news/kb5082063-lsass-reboot-loops-microsoft-out-of-band-fixes-for-server-2025-2022.414389/","kind":"fix","match":"line","pinned":false,"score":0.989},{"thread_id":416641,"node_id":4,"title":"Windows Server 2025 Upgrade via Windows Update: Opt-in Path for 2019 and 2022","replies":0,"views":1672,"post_date":1778022537,"last_post_date":1778022537,"url":"https://windowsforum.com/news/windows-server-2025-upgrade-via-windows-update-opt-in-path-for-2019-and-2022.416641/","kind":"coverage","match":"line","pinned":false,"score":0.8171},{"thread_id":419186,"node_id":84,"title":"Hitachi Energy GMS600 CVE-2022-4304: Fix OpenSSL RSA Timing Risk (v1.3.2)","replies":0,"views":534,"post_date":1779383601,"last_post_date":1779383601,"url":"https://windowsforum.com/news/hitachi-energy-gms600-cve-2022-4304-fix-openssl-rsa-timing-risk-v1-3-2.419186/","kind":"fix","match":"line","pinned":false,"score":0.642},{"thread_id":419642,"node_id":4,"title":"Wittytool Disk Clone: Can You Change SIDs on Cloned Windows Server 2019/2022?","replies":0,"views":242,"post_date":1779784913,"last_post_date":1779784913,"url":"https://windowsforum.com/news/wittytool-disk-clone-can-you-change-sids-on-cloned-windows-server-2019-2022.419642/","kind":"coverage","match":"line","pinned":false,"score":0.5904}],"tutorials":[],"threads":[],"total":5,"exact":1,"window_days":45},"related":{"history":[{"build":"20348.5386","title":null,"created":1784030400,"kb":"KB5099540","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.5386/","current":false},{"build":"20348.5256","title":null,"created":1781006400,"kb":"KB5094128","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.5256/","current":false},{"build":"20348.5139","title":null,"created":1778587200,"kb":"KB5087545","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.5139/","current":false},{"build":"20348.5024","title":null,"created":1776600000,"kb":"KB5091575","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.5024/","current":true},{"build":"20348.5020","title":null,"created":1776168000,"kb":"KB5082142","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.5020/","current":false},{"build":"20348.4893","title":null,"created":1773144000,"kb":"KB5078766","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.4893/","current":false},{"build":"20348.4776","title":null,"created":1772452800,"kb":"KB5082314","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.4776/","current":false},{"build":"20348.4773","title":null,"created":1770724800,"kb":"KB5075906","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.4773/","current":false}],"history_total":94,"prev":{"build":"20348.5020","title":null,"created":1776168000,"kb":"KB5082142","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.5020/","current":false},"next":{"build":"20348.5139","title":null,"created":1778587200,"kb":"KB5087545","build_type":"release","channel_label":"Release","kind":null,"url":"/builds/windowsserver/20348.5139/","current":false},"wave":[]},"source":"microsoft","indexable":true,"generated":1790174105}