From 04e919f0fd3bc399b25120923308bbdbe9380ce3 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Thu, 29 Jan 2026 21:10:23 -0800 Subject: [PATCH 1/3] publish 1D release notes --- .../2025/10-14-october-cumulative-update.md | 1 + ...01-29-october-cumulative-update-preview.md | 42 +++++++++++++++++++ docs/framework/release-notes/release-notes.md | 5 ++- docs/framework/toc.yml | 2 + 4 files changed, 48 insertions(+), 2 deletions(-) create mode 100644 docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md diff --git a/docs/framework/release-notes/2025/10-14-october-cumulative-update.md b/docs/framework/release-notes/2025/10-14-october-cumulative-update.md index 13547fd4da9f7..87da53290dee6 100644 --- a/docs/framework/release-notes/2025/10-14-october-cumulative-update.md +++ b/docs/framework/release-notes/2025/10-14-october-cumulative-update.md @@ -6,6 +6,7 @@ ms.date: 10/14/2025 # October 2025 cumulative update _Released October 14, 2025_ +_Updated November 10, 2025_ ## Summary of what's new in this release diff --git a/docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md b/docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md new file mode 100644 index 0000000000000..1b7eaea2e4331 --- /dev/null +++ b/docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md @@ -0,0 +1,42 @@ +--- +title: January 2026 cumulative update preview +description: Learn about the improvements in the .NET Framework January 2026 cumulative update preview. +ms.date: 01/29/2026 +--- +# January 2026 cumulative update preview + +_Released January 29, 2026_ + +## Summary of what's new in this release + +- [Security improvements](#security-improvements) +- [Quality and reliability improvements](#quality-and-reliability-improvements) + +### Security improvements + +There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements. + +### Quality and reliability improvements + +#### .NET Runtime + +Addresses an issue to add verification logic for ClickOnce to support SHA384 and SHA512. (*Applies to: .NET Framework 4.8.1*) + +Addresses an issue in cases where the arm64 CLR could crash when code generates and catches a NullReferenceException within the same function. (*Applies to: .NET Framework 4.8.1*) + +## Known issues in this release + +This release contains no known issues. + +## Summary tables + +The following table outlines the updates in this release. + +| Product version | Cumulative update preview | +| --- | --- | +| **Windows 11, version 25H2** | | +| .NET Framework 3.5, 4.8.1 | [5074828](https://support.microsoft.com/kb/5074828) | +| **Windows 11, version 24H2** | | +| .NET Framework 3.5, 4.8.1 | [5074831](https://support.microsoft.com/kb/5074831) | + +The operating system row lists a KB that's used for update offering purposes. When the operating system KB is offered, the applicability logic determines the specific .NET Framework update(s) installed. Updates for individual .NET Framework versions are installed based on the version of .NET Framework that is already present on the device. Because of this, the operating system KB is not expected to be listed as installed updates on the device. The expected updates installed are the .NET Framework-specific version updates listed in the previous table. diff --git a/docs/framework/release-notes/release-notes.md b/docs/framework/release-notes/release-notes.md index 423bda683ab52..4186f544356ed 100644 --- a/docs/framework/release-notes/release-notes.md +++ b/docs/framework/release-notes/release-notes.md @@ -1,7 +1,7 @@ --- title: .NET Framework release information description: Improvements in the .NET Framework servicing cumulative updates. -ms.date: 08/26/2025 +ms.date: 01/29/2026 --- # .NET Framework release notes @@ -11,7 +11,8 @@ The .NET Framework updates include cumulative security and reliability improveme .NET Framework cumulative update releases are discussed in detail in the following individual release notes: -* October 28, 2025 - [cumulative update preview](./2025/10-28-october-cumulative-update-preview.md) **New Release** +* January 29, 2026 - [cumulative update preview](./2026/01-29-october-cumulative-update-preview.md) **New Release** +* October 28, 2025 - [cumulative update preview](./2025/10-28-october-cumulative-update-preview.md) * October 14, 2025 - [cumulative update](./2025/10-14-october-cumulative-update.md) * September 9, 2025 - [cumulative update](./2025/09-09-september-cumulative-update.md) * August 26, 2025 - [cumulative update preview](./2025/08-26-august-cumulative-update-preview.md) diff --git a/docs/framework/toc.yml b/docs/framework/toc.yml index 2212028c2615c..3e9590d066866 100644 --- a/docs/framework/toc.yml +++ b/docs/framework/toc.yml @@ -707,6 +707,8 @@ items: href: release-notes/2025/10-14-october-cumulative-update.md - name: October 2025 cumulative update preview href: release-notes/2025/10-28-october-cumulative-update-preview.md + - name: January 2026 cumulative update preview + href: release-notes/2026/01-29-january-cumulative-update-preview.md - name: What's new href: whats-new/index.md - name: What's new in accessibility From 56e00091d0f12a5715cd05fa56f420c359f5b514 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Thu, 29 Jan 2026 21:51:26 -0800 Subject: [PATCH 2/3] Update docs/framework/toc.yml Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> --- docs/framework/toc.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/framework/toc.yml b/docs/framework/toc.yml index 3e9590d066866..9caa626263c34 100644 --- a/docs/framework/toc.yml +++ b/docs/framework/toc.yml @@ -708,7 +708,7 @@ items: - name: October 2025 cumulative update preview href: release-notes/2025/10-28-october-cumulative-update-preview.md - name: January 2026 cumulative update preview - href: release-notes/2026/01-29-january-cumulative-update-preview.md + href: release-notes/2026/01-29-october-cumulative-update-preview.md - name: What's new href: whats-new/index.md - name: What's new in accessibility From 62c4e675fb645da8f75d75ba6c6bcb585bdb0641 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Fri, 30 Jan 2026 20:52:36 -0800 Subject: [PATCH 3/3] Update docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md Co-authored-by: Genevieve Warren <24882762+gewarren@users.noreply.github.com> --- .../2026/01-29-october-cumulative-update-preview.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md b/docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md index 1b7eaea2e4331..62f290f96b70e 100644 --- a/docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md +++ b/docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md @@ -22,7 +22,7 @@ There are no new security improvements in this release. This update is cumulativ Addresses an issue to add verification logic for ClickOnce to support SHA384 and SHA512. (*Applies to: .NET Framework 4.8.1*) -Addresses an issue in cases where the arm64 CLR could crash when code generates and catches a NullReferenceException within the same function. (*Applies to: .NET Framework 4.8.1*) +Addresses an issue in cases where the Arm64 CLR could crash when code generates and catches a NullReferenceException within the same function. (*Applies to: .NET Framework 4.8.1*) ## Known issues in this release