From 76736a115c244d864ec8e3be11df32f0cf681ece Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Fri, 6 Feb 2026 19:06:46 -0800 Subject: [PATCH 1/4] february 2026 rel notes for 26h1 release --- ...1-29-january-cumulative-update-preview.md} | 0 .../2026/02-10-february-cumulative-update.md | 46 +++++++++++++++++++ docs/framework/release-notes/release-notes.md | 3 +- docs/framework/toc.yml | 4 +- 4 files changed, 51 insertions(+), 2 deletions(-) rename docs/framework/release-notes/2026/{01-29-october-cumulative-update-preview.md => 01-29-january-cumulative-update-preview.md} (100%) create mode 100644 docs/framework/release-notes/2026/02-10-february-cumulative-update.md diff --git a/docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md b/docs/framework/release-notes/2026/01-29-january-cumulative-update-preview.md similarity index 100% rename from docs/framework/release-notes/2026/01-29-october-cumulative-update-preview.md rename to docs/framework/release-notes/2026/01-29-january-cumulative-update-preview.md diff --git a/docs/framework/release-notes/2026/02-10-february-cumulative-update.md b/docs/framework/release-notes/2026/02-10-february-cumulative-update.md new file mode 100644 index 0000000000000..693f2eb1726c7 --- /dev/null +++ b/docs/framework/release-notes/2026/02-10-february-cumulative-update.md @@ -0,0 +1,46 @@ +--- +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 + +#### CVE-2025-55248 – Information Disclosure vulnerability + +This security update addresses an information disclosure vulnerability detailed in [CVE 2025-55248](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55248). + +### Quality and reliability improvements + +#### .NET Runtime + +Addresses an issue to update operating system calls for compliance with current standards. (*Applies to: .NET Framework 4.8.1*) + +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 26H1** | | +| .NET Framework 4.8.1 | [5074837][kbLink] | + +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. + +[kbLink]: https://support.microsoft.com/kb/5074837 \ No newline at end of file diff --git a/docs/framework/release-notes/release-notes.md b/docs/framework/release-notes/release-notes.md index 4186f544356ed..b4b2fd4017b02 100644 --- a/docs/framework/release-notes/release-notes.md +++ b/docs/framework/release-notes/release-notes.md @@ -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: -* January 29, 2026 - [cumulative update preview](./2026/01-29-october-cumulative-update-preview.md) **New Release** +* February 10, 2026 - [cumulative update preview](./2026/02-10-february-cumulative-update.md) **New Release** +* January 29, 2026 - [cumulative update preview](./2026/01-29-january-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) diff --git a/docs/framework/toc.yml b/docs/framework/toc.yml index ba053f8c1f783..e7545e57c654a 100644 --- a/docs/framework/toc.yml +++ b/docs/framework/toc.yml @@ -714,7 +714,9 @@ 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-october-cumulative-update-preview.md + href: release-notes/2026/01-29-january-cumulative-update-preview.md + - name: February 2026 cumulative update + href: release-notes/2026/02-10-february-cumulative-update.md - name: What's new href: whats-new/index.md - name: What's new in accessibility From cd202f33d7c765f3a002ebbdd085b1372acbc9a9 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Fri, 6 Feb 2026 19:12:04 -0800 Subject: [PATCH 2/4] Update 02-10-february-cumulative-update.md --- .../2026/02-10-february-cumulative-update.md | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/docs/framework/release-notes/2026/02-10-february-cumulative-update.md b/docs/framework/release-notes/2026/02-10-february-cumulative-update.md index 693f2eb1726c7..79030f7928e4d 100644 --- a/docs/framework/release-notes/2026/02-10-february-cumulative-update.md +++ b/docs/framework/release-notes/2026/02-10-february-cumulative-update.md @@ -1,11 +1,11 @@ --- -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 +title: February 2026 cumulative update +description: Learn about the improvements in the .NET Framework February 2026 cumulative update. +ms.date: 02/10/2026 --- -# January 2026 cumulative update preview +# February 2026 cumulative update preview -_Released January 29, 2026_ +_Released February 10, 2026_ ## Summary of what's new in this release From ab5f6774b51c2259411765b746a270bd51991c43 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Mon, 9 Feb 2026 12:50:02 -0800 Subject: [PATCH 3/4] Update title for February 2026 cumulative update --- .../release-notes/2026/02-10-february-cumulative-update.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/framework/release-notes/2026/02-10-february-cumulative-update.md b/docs/framework/release-notes/2026/02-10-february-cumulative-update.md index 79030f7928e4d..b0a330afe7856 100644 --- a/docs/framework/release-notes/2026/02-10-february-cumulative-update.md +++ b/docs/framework/release-notes/2026/02-10-february-cumulative-update.md @@ -3,7 +3,7 @@ title: February 2026 cumulative update description: Learn about the improvements in the .NET Framework February 2026 cumulative update. ms.date: 02/10/2026 --- -# February 2026 cumulative update preview +# February 2026 cumulative update _Released February 10, 2026_ @@ -43,4 +43,4 @@ The following table outlines the updates in this release. 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. -[kbLink]: https://support.microsoft.com/kb/5074837 \ No newline at end of file +[kbLink]: https://support.microsoft.com/kb/5074837 From 4af92f148c6c3baf9cdbfc3197762774ca9b65d6 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Mon, 9 Feb 2026 12:51:09 -0800 Subject: [PATCH 4/4] Change 'cumulative update preview' to 'cumulative update' --- docs/framework/release-notes/release-notes.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/framework/release-notes/release-notes.md b/docs/framework/release-notes/release-notes.md index b4b2fd4017b02..af4c6d43d6adf 100644 --- a/docs/framework/release-notes/release-notes.md +++ b/docs/framework/release-notes/release-notes.md @@ -11,7 +11,7 @@ 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: -* February 10, 2026 - [cumulative update preview](./2026/02-10-february-cumulative-update.md) **New Release** +* February 10, 2026 - [cumulative update](./2026/02-10-february-cumulative-update.md) **New Release** * January 29, 2026 - [cumulative update preview](./2026/01-29-january-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)