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| purl | pkg:nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm@10.0.4 |
| Vulnerability | Summary | Fixed by |
|---|---|---|
| This package is not known to be affected by vulnerabilities. | ||
| Vulnerability | Summary | Aliases |
|---|---|---|
| VCID-bnkq-wms1-f7dp | # Microsoft Security Advisory CVE-2026-26127 – .NET Denial of Service Vulnerability ## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 9.0 and .NET 10.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in .NET and Microsoft.Bcl.Memory due to an out-of-bounds read when decoding malformed Base64Url input. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/384 ## CVSS Details - **Version:** 3.1 - **Score:** 7.5 - **Vector:** `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C` - **Severity:** High - **Weakness:** CWE-129 (Improper Validation of Array Index); CWE-125 (Out-of-bounds Read) ## Affected Platforms - **Platforms:** All - **Architectures:** All ## Affected Products ### <a name=".NET 9"></a>.NET 9 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | >= 9.0.0, <= 9.0.13 | 9.0.14 [Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | >= 9.0.0, <= 9.0.13 | 9.0.14 ### <a name=".NET 10"></a>.NET 10 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.osx-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.osx-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.osx-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.win-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.win-x86) | >= 10.0.0, <= 10.0.3 | 10.0.4 ### <a name="Microsoft.Bcl.Memory 9.0.14"></a>Microsoft.Bcl.Memory 9.0.14 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.Bcl.Memory](https://www.nuget.org/packages/Microsoft.Bcl.Memory) | >= 9.0.0, <= 9.0.13 | 9.0.14 ### <a name="Microsoft.Bcl.Memory 10.0.4"></a>Microsoft.Bcl.Memory 10.0.4 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.Bcl.Memory](https://www.nuget.org/packages/Microsoft.Bcl.Memory) | >= 10.0.0, <= 10.0.3 | 10.0.4 ### <a name="how-fix"></a>How to fix the issue To update the Microsoft.Bcl.Memory NuGet package, apply one of the following methods: NuGet Package Manager UI in Visual Studio: - Open the project in Visual Studio. - Right-click on the project in Solution Explorer and select "Manage NuGet Packages..." or navigate to "Project > Manage NuGet Packages". - In the NuGet Package Manager window, select the "Updates" tab. This tab lists packages with available updates from the configured package sources. - Select the package(s) to update. A specific version can be chosen from the dropdown, or the latest available version can be selected. - Click the "Update" button. Using the NuGet Package Manager Console in Visual Studio: - Open the project in Visual Studio. - Navigate to "Tools > NuGet Package Manager > Package Manager Console". - To update a specific package to its latest version, run the following Update-Package command: ``` Update-Package -Id Microsoft.Bcl.Memory ``` Using the .NET CLI (Command Line Interface): - Open a terminal or command prompt in the project's directory. - To update a specific package to its latest version, run the following command: ``` dotnet package update Microsoft.Bcl.Memory ``` Once the NuGet package reference has been updated, the application must be recompiled and redeployed. Additionally, it is recommended to update the runtime and/or SDKs, but unless the application targets .NET 9 or higher, updating the runtime and/or SDK is not a required step to patch this vulnerability. ## Other Information ### Reporting Security Issues If a potential security issue has been found in a supported version of .NET, it should be reported to the Microsoft Security Response Center (MSRC) via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new). Further information can be found in the MSRC [Report an Issue FAQ](https://www.microsoft.com/msrc/faqs-report-an-issue). Security reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty. ### Support Questions about this issue can be asked on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. Questions can be asked in the linked discussion issue. ### Disclaimer The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. ### External Links [CVE-2026-26127](https://www.cve.org/CVERecord?id=CVE-2026-26127) ### Revisions V1.0 (March 10, 2026): Advisory published. |
CVE-2026-26127
GHSA-73j8-2gch-69rq |
| VCID-cq8d-59u6-2bc5 | # Microsoft Security Advisory CVE-2026-26131 – .NET Elevation of Privilege Vulnerability ## Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 10.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. An elevation of privilege vulnerability exists in .NET due to improper authorization. Incorrect packaging permissions could allow an attacker to gain elevated privileges. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/386 ## CVSS Details - **Severity:** High - **Version:** 3.1 - **Score:** 7.8 - **Vector:** `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C` - **Weakness:** CWE-276 (Incorrect Default Permissions) ## Affected Platforms - **Platforms:** Linux - **Architectures:** All ## Affected Products ### <a name=".NET 10"></a>.NET 10 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.NetCore.App.Runtime.linux-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-musl-arm](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-arm64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-musl-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-musl-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4 [Microsoft.NetCore.App.Runtime.linux-x64](https://www.nuget.org/packages/Microsoft.NetCore.App.Runtime.linux-x64) | >= 10.0.0, <= 10.0.3 | 10.0.4 ## Advisory FAQ ### <a name="how-affected"></a>How do I know if I am affected? If using an affected package listed in [affected products](#affected-products), you're exposed to the vulnerability. ### <a name="how-fix"></a>How do I fix the issue? 1. To fix the issue please install the latest version of .NET 10.0. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs. 2. If your application references the vulnerable package, update the package reference to the patched version. You can list the versions you have installed by running the `dotnet --info` command. Once you have installed the updated runtime or SDK, restart your apps for the update to take effect. Additionally, if you've deployed [self-contained applications](https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd) targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed. ## Other Information ### Reporting Security Issues If you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC) via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new). Further information can be found in the MSRC [Report an Issue FAQ](https://www.microsoft.com/msrc/faqs-report-an-issue). Security reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty. ### Support You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue. ### Disclaimer The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. ### External Links [CVE-2026-26131]( https://www.cve.org/CVERecord?id=CVE-2026-26131) ### Acknowledgements Igor Kovalchuk ### Revisions V1.0 (March 10, 2026): Advisory published. |
CVE-2026-26131
GHSA-crjq-wm6x-6qx7 |
| VCID-e5t8-uenc-6uag | Duplicate Advisory: Microsoft Security Advisory CVE-2026-26131 – .NET Elevation of Privilege Vulnerability ### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-crjq-wm6x-6qx7. This link is maintained to preserve external references. ### Original Description Incorrect default permissions in .NET allows an authorized attacker to elevate privileges locally. |
GHSA-387c-qmrw-59qv
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