From 1fe0a5b417bc63cb72fe850ea8e5c1b8093b957c Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Fri, 21 Aug 2026 08:08:37 -0700 Subject: [PATCH 1/4] 8D release notes --- .../08-25-august-cumulative-update-preview.md | 42 +++++++++++++++++++ docs/framework/release-notes/release-notes.md | 3 +- docs/framework/toc.yml | 2 + 3 files changed, 46 insertions(+), 1 deletion(-) create mode 100644 docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md diff --git a/docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md b/docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md new file mode 100644 index 0000000000000..a143f53b4a208 --- /dev/null +++ b/docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md @@ -0,0 +1,42 @@ +--- +title: August 2026 cumulative update preview +description: Learn about the improvements in the .NET Framework August 2026 cumulative update preview. +ms.date: 08/25/2026 +--- +# .NET Framework August 2026 cumulative update preview + +_Released August 25, 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 where intermittent crashes could occur in some 64-bit .NET Framework scenarios. (*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 3.5, 4.8.1 | [5122386](https://support.microsoft.com/kb/5122386) | +| **Windows 11, version 25H2** | | +| .NET Framework 3.5, 4.8.1 | [5122385](https://support.microsoft.com/kb/5122385) | +| **Windows 11, version 24H2** | | +| .NET Framework 3.5, 4.8.1 | [5122385](https://support.microsoft.com/kb/5122385) | + +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 825f760c2a206..f04c08dc5de36 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: -* August 11, 2026 - [cumulative update](./2026/08-11-august-cumulative-update.md) **New Release** +* August 25, 2026 - [cumulative update preview](./2026/08-25-august-cumulative-update-preview.md) **New Release** +* August 11, 2026 - [cumulative update](./2026/08-11-august-cumulative-update.md) * July 14, 2026 - [cumulative update](./2026/07-14-july-cumulative-update.md) * May 26, 2026 - [cumulative update preview](./2026/05-26-may-cumulative-update-preview.md) * May 12, 2026 - [cumulative update](./2026/05-12-may-cumulative-update.md) diff --git a/docs/framework/toc.yml b/docs/framework/toc.yml index 705a03d45ba63..e04519ff1e5ef 100644 --- a/docs/framework/toc.yml +++ b/docs/framework/toc.yml @@ -679,6 +679,8 @@ items: items: - name: Overview and index href: release-notes/release-notes.md + - name: August 2026 cumulative update preview + href: release-notes/2026/08-25-august-cumulative-update-preview.md - name: August 2026 cumulative update href: release-notes/2026/08-11-august-cumulative-update.md - name: July 2026 cumulative update From bf5a6f151144df712a1c8cf812ef373520b29a04 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Mon, 24 Aug 2026 20:16:25 -0700 Subject: [PATCH 2/4] Change release date to August 27, 2026 Updated release date for the August 2026 cumulative update preview. --- .../2026/08-25-august-cumulative-update-preview.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md b/docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md index a143f53b4a208..25c0c4fca3d49 100644 --- a/docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md +++ b/docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md @@ -1,11 +1,11 @@ --- title: August 2026 cumulative update preview description: Learn about the improvements in the .NET Framework August 2026 cumulative update preview. -ms.date: 08/25/2026 +ms.date: 08/27/2026 --- # .NET Framework August 2026 cumulative update preview -_Released August 25, 2026_ +_Released August 27, 2026_ ## Summary of what's new in this release From ee404868313d30bdb4fef96f76b60b96f3203466 Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Mon, 24 Aug 2026 20:17:14 -0700 Subject: [PATCH 3/4] Update release date for August cumulative update preview Updated the release date for the cumulative update preview and modified the corresponding link. --- docs/framework/release-notes/release-notes.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/framework/release-notes/release-notes.md b/docs/framework/release-notes/release-notes.md index f04c08dc5de36..1fc8f7fff02fe 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: 04/14/2026 +ms.date: 08/27/2026 --- # .NET Framework release notes @@ -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: -* August 25, 2026 - [cumulative update preview](./2026/08-25-august-cumulative-update-preview.md) **New Release** +* August 27, 2026 - [cumulative update preview](./2026/08-27-august-cumulative-update-preview.md) **New Release** * August 11, 2026 - [cumulative update](./2026/08-11-august-cumulative-update.md) * July 14, 2026 - [cumulative update](./2026/07-14-july-cumulative-update.md) * May 26, 2026 - [cumulative update preview](./2026/05-26-may-cumulative-update-preview.md) From 7f2a7ab625f681763b0e4163d3f8832cb74b959b Mon Sep 17 00:00:00 2001 From: Tara Overfield Date: Mon, 24 Aug 2026 20:20:18 -0700 Subject: [PATCH 4/4] update date --- ...ate-preview.md => 08-27-august-cumulative-update-preview.md} | 0 docs/framework/toc.yml | 2 +- 2 files changed, 1 insertion(+), 1 deletion(-) rename docs/framework/release-notes/2026/{08-25-august-cumulative-update-preview.md => 08-27-august-cumulative-update-preview.md} (100%) diff --git a/docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md b/docs/framework/release-notes/2026/08-27-august-cumulative-update-preview.md similarity index 100% rename from docs/framework/release-notes/2026/08-25-august-cumulative-update-preview.md rename to docs/framework/release-notes/2026/08-27-august-cumulative-update-preview.md diff --git a/docs/framework/toc.yml b/docs/framework/toc.yml index e04519ff1e5ef..d37c85a679de3 100644 --- a/docs/framework/toc.yml +++ b/docs/framework/toc.yml @@ -680,7 +680,7 @@ items: - name: Overview and index href: release-notes/release-notes.md - name: August 2026 cumulative update preview - href: release-notes/2026/08-25-august-cumulative-update-preview.md + href: release-notes/2026/08-27-august-cumulative-update-preview.md - name: August 2026 cumulative update href: release-notes/2026/08-11-august-cumulative-update.md - name: July 2026 cumulative update