Ubuntu USN · USN-8216-1

.NET vulnerabilities

Published: Tue, 28 Apr 2026 07:32

CVE-2026-33116CVE-2026-32178CVE-2026-26171CVE-2026-32203CVE-2026-40372

Summary

Several security issues were fixed in .NET.

Details

Ludvig Pedersen discovered that the System.Security.Cryptography.Xml library in .NET incorrectly handled certain XML inputs. An attacker could possibly use this issue to consume excessive resources, resulting in a denial of service. (CVE-2026-33116, CVE-2026-26171) Ludvig Pedersen and Kevin Jones discovered that the System.Security.Cryptography.Xml library in .NET incorrectly handled certain XML inputs. An attacker could possibly use this issue to cause .NET to crash, resulting in a denial of service. (CVE-2026-32203) Ludvig Pedersen discovered that the System.Net.Mail component in .NET incorrectly handled certain inputs. An attacker could possibly use this issue to perform a network spoofing attack. (CVE-2026-32178) It was discovered that the Microsoft.AspNetCore.DataProtection library in .NET did not properly verify cryptographic signatures under certain conditions. A remote attacker could possibly use this issue to elevate privileges. (CVE-2026-40372)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu resolute

dotnet10→10.0.107-10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.107-10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet10
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
aspnetcore-runtime-10.0→10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y aspnetcore-runtime-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
aspnetcore-runtime-dbg-10.0→10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y aspnetcore-runtime-dbg-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
aspnetcore-targeting-pack-10.0→10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y aspnetcore-targeting-pack-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-apphost-pack-10.0→10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-apphost-pack-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-host-10.0→10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-host-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-hostfxr-10.0→10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-hostfxr-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-runtime-10.0→10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-runtime-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-runtime-dbg-10.0→10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-runtime-dbg-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-sdk-10.0→10.0.107-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.107-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-sdk-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-sdk-10.0-source-built-artifacts→10.0.107-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.107-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-sdk-10.0-source-built-artifacts
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-sdk-aot-10.0→10.0.107-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.107-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-sdk-aot-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-sdk-dbg-10.0→10.0.107-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.107-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-sdk-dbg-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-targeting-pack-10.0→10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-targeting-pack-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet-templates-10.0→10.0.107-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.107-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet-templates-10.0
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
dotnet10→10.0.107-10.0.7-0ubuntu1~26.04.1apt_upgrade
Standard apt upgrade. Install 10.0.107-10.0.7-0ubuntu1~26.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y dotnet10
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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