Vulnerability · Published Mar 10, 2026 · Assigned by microsoft
CVE-2026-26127.NET Denial of Service Vulnerability
High 7.5
In plain English
A high-severity out-of-bounds read in Microsoft.Bcl.Memory from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 83% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)2.3%top 16.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | aspnetcore-runtime-10.0 | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | aspnetcore-runtime-10.0 | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | aspnetcore-runtime-10.0 | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | aspnetcore-runtime-9.0 | 9.0.14-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | aspnetcore-runtime-9.0 | 9.0.14-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | aspnetcore-runtime-9.0 | 9.0.14-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-10.0 | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-10.0 | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-10.0 | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-9.0 | 9.0.14-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-9.0 | 9.0.14-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-9.0 | 9.0.14-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | aspnetcore-targeting-pack-10.0 | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | aspnetcore-targeting-pack-10.0 | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | aspnetcore-targeting-pack-10.0 | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | aspnetcore-targeting-pack-9.0 | 9.0.14-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | aspnetcore-targeting-pack-9.0 | 9.0.14-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | aspnetcore-targeting-pack-9.0 | 9.0.14-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:8 | dotnet | 10.0.104-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:10 | dotnet-apphost-pack-10.0 | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-apphost-pack-10.0 | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-apphost-pack-10.0 | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-apphost-pack-9.0 | 9.0.14-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-apphost-pack-9.0 | 9.0.14-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-apphost-pack-9.0 | 9.0.14-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | dotnet-host | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-host | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-host | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-hostfxr-10.0 | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-hostfxr-10.0 | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-hostfxr-10.0 | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-hostfxr-9.0 | 9.0.14-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-hostfxr-9.0 | 9.0.14-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-hostfxr-9.0 | 9.0.14-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | dotnet-runtime-10.0 | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-runtime-10.0 | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-runtime-10.0 | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-runtime-9.0 | 9.0.14-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-runtime-9.0 | 9.0.14-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-runtime-9.0 | 9.0.14-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | dotnet-runtime-dbg-10.0 | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-runtime-dbg-10.0 | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-runtime-dbg-10.0 | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-runtime-dbg-9.0 | 9.0.14-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-runtime-dbg-9.0 | 9.0.14-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-runtime-dbg-9.0 | 9.0.14-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | dotnet-sdk-10.0 | 10.0.104-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-sdk-10.0 | 10.0.104-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-sdk-10.0 | 10.0.104-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-sdk-10.0-source-built-artifacts | 10.0.104-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-sdk-10.0-source-built-artifacts | 10.0.104-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-sdk-10.0-source-built-artifacts | 10.0.104-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-sdk-9.0 | 9.0.115-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-sdk-9.0 | 9.0.115-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-sdk-9.0 | 9.0.115-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | dotnet-sdk-9.0-source-built-artifacts | 9.0.115-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-sdk-9.0-source-built-artifacts | 9.0.115-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-sdk-9.0-source-built-artifacts | 9.0.115-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | dotnet-sdk-aot-10.0 | 10.0.104-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-sdk-aot-10.0 | 10.0.104-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-sdk-aot-10.0 | 10.0.104-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-sdk-aot-9.0 | 9.0.115-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-sdk-aot-9.0 | 9.0.115-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-sdk-aot-9.0 | 9.0.115-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | dotnet-sdk-dbg-10.0 | 10.0.104-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-sdk-dbg-10.0 | 10.0.104-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-sdk-dbg-10.0 | 10.0.104-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-sdk-dbg-9.0 | 9.0.115-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-sdk-dbg-9.0 | 9.0.115-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-sdk-dbg-9.0 | 9.0.115-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | dotnet-targeting-pack-10.0 | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-targeting-pack-10.0 | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-targeting-pack-10.0 | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-targeting-pack-9.0 | 9.0.14-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-targeting-pack-9.0 | 9.0.14-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-targeting-pack-9.0 | 9.0.14-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | dotnet-templates-10.0 | 10.0.104-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux:8 | dotnet-templates-10.0 | 10.0.104-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux:9 | dotnet-templates-10.0 | 10.0.104-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux:10 | dotnet-templates-9.0 | 9.0.115-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | dotnet-templates-9.0 | 9.0.115-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | dotnet-templates-9.0 | 9.0.115-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux:10 | netstandard-targeting-pack-2.1 | 9.0.115-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux:8 | netstandard-targeting-pack-2.1 | 9.0.115-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux:9 | netstandard-targeting-pack-2.1 | 9.0.115-1.el9_7 | ALSA-2026:4456 |
| Alpine:v3.23 | dotnet10-runtime | 10.0.4-r0 | ALPINE-CVE-2026-26127 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.4-r0 | ALPINE-CVE-2026-26127 |
| Alpine:v3.21 | dotnet9-runtime | 9.0.14-r0 | ALPINE-CVE-2026-26127 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.14-r0 | ALPINE-CVE-2026-26127 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.14-r0 | ALPINE-CVE-2026-26127 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.14-r0 | ALPINE-CVE-2026-26127 |
| NuGet | microsoft.bcl.memory | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.bcl.memory | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-arm | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-arm | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-arm64 | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-arm64 | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm64 | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm64 | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-musl-x64 | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-musl-x64 | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.osx-arm64 | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.osx-arm64 | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.osx-x64 | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.osx-x64 | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.win-arm | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.win-arm | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.win-arm64 | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.win-arm64 | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 9.0.14 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.win-x86 | 10.0.4 | GHSA-73j8-2gch-69rq |
| NuGet | microsoft.netcore.app.runtime.win-x86 | 9.0.14 | GHSA-73j8-2gch-69rq |
| Rocky Linux:10 | dotnet10.0 | 0:10.0.104-1.el10_1 | RLSA-2026:4453 |
| Rocky Linux:8 | dotnet10.0 | 0:10.0.104-1.el8_10 | RLSA-2026:4458 |
| Rocky Linux:9 | dotnet10.0 | 0:10.0.104-1.el9_7 | RLSA-2026:4445 |
| Rocky Linux:10 | dotnet9.0 | 0:9.0.115-1.el10_1 | RLSA-2026:4450 |
| Rocky Linux:8 | dotnet9.0 | 0:9.0.115-1.el8_10 | RLSA-2026:4443 |
| Rocky Linux:9 | dotnet9.0 | 0:9.0.115-1.el9_7 | RLSA-2026:4456 |
| Ubuntu:24.04:LTS | dotnet10 | 10.0.104-10.0.4-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-26127 |
| Ubuntu:25.10 | dotnet10 | 10.0.104-10.0.4-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-26127 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-26127 |
| Ubuntu:25.10 | dotnet9 | 9.0.115-9.0.14-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-26127 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 10.0 | 10.0.0 – before 10.0.4 |
| Microsoft | .NET 9.0 | 9.0.0 – before 9.0.14 |
| Microsoft | Microsoft.Bcl.Memory | 10.0.0 – before 10.0.4 |
| Microsoft | Microsoft.Bcl.Memory | 9.0.0 – before 9.0.14 |
Weakness: CWE-125 · 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
References
- .NET Denial of Service Vulnerability vendor-advisory, patch