High severity7.5NVD Advisory· Published Mar 10, 2026· Updated Apr 1, 2026
CVE-2026-26127
CVE-2026-26127
Description
Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
Microsoft.Bcl.MemoryNuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.linux-armNuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.linux-arm64NuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.linux-musl-armNuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.linux-musl-arm64NuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.linux-musl-x64NuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.linux-x64NuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.osx-arm64NuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.osx-x64NuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.win-armNuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.win-arm64NuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.win-x64NuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.NetCore.App.Runtime.win-x86NuGet | >= 9.0.0, < 9.0.14 | 9.0.14 |
Microsoft.Bcl.MemoryNuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.linux-armNuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.linux-arm64NuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.linux-musl-armNuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.linux-musl-arm64NuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.linux-musl-x64NuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.linux-x64NuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.osx-arm64NuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.osx-x64NuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.win-armNuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.win-x64NuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.win-x86NuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Microsoft.NetCore.App.Runtime.win-arm64NuGet | >= 10.0.0, < 10.0.4 | 10.0.4 |
Affected products
48- osv-coords46 versionspkg:apk/chainguard/dotnet-bootstrap-9pkg:apk/wolfi/dotnet-bootstrap-9pkg:bitnami/dotnetpkg:bitnami/dotnet-sdkpkg:nuget/microsoft.bcl.memorypkg:nuget/microsoft.netcore.app.runtime.linux-armpkg:nuget/microsoft.netcore.app.runtime.linux-arm64pkg:nuget/microsoft.netcore.app.runtime.linux-musl-armpkg:nuget/microsoft.netcore.app.runtime.linux-musl-arm64pkg:nuget/microsoft.netcore.app.runtime.linux-musl-x64pkg:nuget/microsoft.netcore.app.runtime.linux-x64pkg:nuget/microsoft.netcore.app.runtime.osx-arm64pkg:nuget/microsoft.netcore.app.runtime.osx-x64pkg:nuget/microsoft.netcore.app.runtime.win-armpkg:nuget/microsoft.netcore.app.runtime.win-arm64pkg:nuget/microsoft.netcore.app.runtime.win-x64pkg:nuget/microsoft.netcore.app.runtime.win-x86pkg:rpm/almalinux/aspnetcore-runtime-10.0pkg:rpm/almalinux/aspnetcore-runtime-9.0pkg:rpm/almalinux/aspnetcore-runtime-dbg-10.0pkg:rpm/almalinux/aspnetcore-runtime-dbg-9.0pkg:rpm/almalinux/aspnetcore-targeting-pack-10.0pkg:rpm/almalinux/aspnetcore-targeting-pack-9.0pkg:rpm/almalinux/dotnetpkg:rpm/almalinux/dotnet-apphost-pack-10.0pkg:rpm/almalinux/dotnet-apphost-pack-9.0pkg:rpm/almalinux/dotnet-hostpkg:rpm/almalinux/dotnet-hostfxr-10.0pkg:rpm/almalinux/dotnet-hostfxr-9.0pkg:rpm/almalinux/dotnet-runtime-10.0pkg:rpm/almalinux/dotnet-runtime-9.0pkg:rpm/almalinux/dotnet-runtime-dbg-10.0pkg:rpm/almalinux/dotnet-runtime-dbg-9.0pkg:rpm/almalinux/dotnet-sdk-10.0pkg:rpm/almalinux/dotnet-sdk-10.0-source-built-artifactspkg:rpm/almalinux/dotnet-sdk-9.0pkg:rpm/almalinux/dotnet-sdk-9.0-source-built-artifactspkg:rpm/almalinux/dotnet-sdk-aot-10.0pkg:rpm/almalinux/dotnet-sdk-aot-9.0pkg:rpm/almalinux/dotnet-sdk-dbg-10.0pkg:rpm/almalinux/dotnet-sdk-dbg-9.0pkg:rpm/almalinux/dotnet-targeting-pack-10.0pkg:rpm/almalinux/dotnet-targeting-pack-9.0pkg:rpm/almalinux/dotnet-templates-10.0pkg:rpm/almalinux/dotnet-templates-9.0pkg:rpm/almalinux/netstandard-targeting-pack-2.1
< 9.0.115-r0+ 45 more
- (no CPE)range: < 9.0.115-r0
- (no CPE)range: < 9.0.115-r0
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: >= 9.0.0, < 9.0.14
- (no CPE)range: < 10.0.4-1.el9_7
- (no CPE)range: < 9.0.14-1.el8_10
- (no CPE)range: < 10.0.4-1.el9_7
- (no CPE)range: < 9.0.14-1.el8_10
- (no CPE)range: < 10.0.4-1.el9_7
- (no CPE)range: < 9.0.14-1.el8_10
- (no CPE)range: < 10.0.104-1.el8_10
- (no CPE)range: < 10.0.4-1.el9_7
- (no CPE)range: < 9.0.14-1.el8_10
- (no CPE)range: < 10.0.4-1.el9_7
- (no CPE)range: < 10.0.4-1.el9_7
- (no CPE)range: < 9.0.14-1.el8_10
- (no CPE)range: < 10.0.4-1.el9_7
- (no CPE)range: < 9.0.14-1.el8_10
- (no CPE)range: < 10.0.4-1.el9_7
- (no CPE)range: < 9.0.14-1.el8_10
- (no CPE)range: < 10.0.104-1.el9_7
- (no CPE)range: < 10.0.104-1.el9_7
- (no CPE)range: < 9.0.115-1.el8_10
- (no CPE)range: < 9.0.115-1.el8_10
- (no CPE)range: < 10.0.104-1.el9_7
- (no CPE)range: < 9.0.115-1.el8_10
- (no CPE)range: < 10.0.104-1.el9_7
- (no CPE)range: < 9.0.115-1.el8_10
- (no CPE)range: < 10.0.4-1.el9_7
- (no CPE)range: < 9.0.14-1.el8_10
- (no CPE)range: < 10.0.104-1.el9_7
- (no CPE)range: < 9.0.115-1.el8_10
- (no CPE)range: < 9.0.115-1.el8_10
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-73j8-2gch-69rqghsaADVISORY
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26127nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-26127ghsaADVISORY
- github.com/dotnet/runtime/security/advisories/GHSA-73j8-2gch-69rqghsaWEB
News mentions
2- Microsoft Fixes Two Publicly Disclosed Zero-DaysInfosecurity Magazine · Mar 11, 2026
- Microsoft Patch Tuesday, March 2026 EditionKrebs on Security · Mar 11, 2026