CVE-2026-45591 · cross-distro fix matrix

CVE-2026-45591: It was discovered that .NET did not properly handle link resolution before

Affects 3 Linux releases across 50 (distro × package) combinations. First disclosed: 2026-06-11.

Fix per ecosystem

Each block below is a distro release where CVE-2026-45591 has a known fix. Run the listed command on that distro to remediate.

Ubuntu jammy

Source: Ubuntu USN

dotnet8→ fixed in8.0.128-8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet8
```
aspnetcore-runtime-8.0→ fixed in8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-runtime-8.0
```
aspnetcore-runtime-dbg-8.0→ fixed in8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-runtime-dbg-8.0
```
aspnetcore-targeting-pack-8.0→ fixed in8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-targeting-pack-8.0
```
dotnet-apphost-pack-8.0→ fixed in8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-apphost-pack-8.0
```
dotnet-host-8.0→ fixed in8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-host-8.0
```
dotnet-hostfxr-8.0→ fixed in8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-hostfxr-8.0
```
dotnet-runtime-8.0→ fixed in8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-runtime-8.0
```
dotnet-runtime-dbg-8.0→ fixed in8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-runtime-dbg-8.0
```
dotnet-sdk-8.0→ fixed in8.0.128-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-8.0
```
dotnet-sdk-8.0-source-built-artifacts→ fixed in8.0.128-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-8.0-source-built-artifacts
```
dotnet-sdk-dbg-8.0→ fixed in8.0.128-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-dbg-8.0
```
dotnet-targeting-pack-8.0→ fixed in8.0.28-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-targeting-pack-8.0
```
dotnet-templates-8.0→ fixed in8.0.128-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-templates-8.0
```
netstandard-targeting-pack-2.1-8.0→ fixed in8.0.128-0ubuntu1~22.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y netstandard-targeting-pack-2.1-8.0
```

Ubuntu noble

Source: Ubuntu USN

dotnet10→ fixed in10.0.109-10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet10
```
dotnet8→ fixed in8.0.128-8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet8
```
aspnetcore-runtime-10.0→ fixed in10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-runtime-10.0
```
aspnetcore-runtime-8.0→ fixed in8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-runtime-8.0
```
aspnetcore-runtime-dbg-10.0→ fixed in10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-runtime-dbg-10.0
```
aspnetcore-runtime-dbg-8.0→ fixed in8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-runtime-dbg-8.0
```
aspnetcore-targeting-pack-10.0→ fixed in10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-targeting-pack-10.0
```
aspnetcore-targeting-pack-8.0→ fixed in8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-targeting-pack-8.0
```
dotnet-apphost-pack-10.0→ fixed in10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-apphost-pack-10.0
```
dotnet-apphost-pack-8.0→ fixed in8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-apphost-pack-8.0
```
dotnet-host-10.0→ fixed in10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-host-10.0
```
dotnet-host-8.0→ fixed in8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-host-8.0
```
dotnet-hostfxr-10.0→ fixed in10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-hostfxr-10.0
```
dotnet-hostfxr-8.0→ fixed in8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-hostfxr-8.0
```
dotnet-runtime-10.0→ fixed in10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-runtime-10.0
```
dotnet-runtime-8.0→ fixed in8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-runtime-8.0
```
dotnet-runtime-dbg-10.0→ fixed in10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-runtime-dbg-10.0
```
dotnet-runtime-dbg-8.0→ fixed in8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-runtime-dbg-8.0
```
dotnet-sdk-10.0→ fixed in10.0.109-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-10.0
```
dotnet-sdk-10.0-source-built-artifacts→ fixed in10.0.109-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-10.0-source-built-artifacts
```
dotnet-sdk-8.0→ fixed in8.0.128-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-8.0
```
dotnet-sdk-8.0-source-built-artifacts→ fixed in8.0.128-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-8.0-source-built-artifacts
```
dotnet-sdk-aot-10.0→ fixed in10.0.109-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-aot-10.0
```
dotnet-sdk-dbg-10.0→ fixed in10.0.109-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-dbg-10.0
```
dotnet-sdk-dbg-8.0→ fixed in8.0.128-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-sdk-dbg-8.0
```
dotnet-targeting-pack-10.0→ fixed in10.0.9-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-targeting-pack-10.0
```
dotnet-targeting-pack-8.0→ fixed in8.0.28-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-targeting-pack-8.0
```
dotnet-templates-10.0→ fixed in10.0.109-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-templates-10.0
```
dotnet-templates-8.0→ fixed in8.0.128-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet-templates-8.0
```
netstandard-targeting-pack-2.1-8.0→ fixed in8.0.128-0ubuntu1~24.04.1USN-8420-1
```
sudo apt-get install --only-upgrade -y netstandard-targeting-pack-2.1-8.0
```

Ubuntu questing

Source: Ubuntu USN

dotnet10→ fixed in10.0.109-10.0.9-0ubuntu1~25.10.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet10
```
dotnet8→ fixed in8.0.128-8.0.28-0ubuntu1~25.10.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet8
```
dotnet9→ fixed in9.0.118-9.0.17-0ubuntu1~25.10.1USN-8420-1
```
sudo apt-get install --only-upgrade -y dotnet9
```
aspnetcore-runtime-10.0→ fixed in10.0.9-0ubuntu1~25.10.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-runtime-10.0
```
aspnetcore-runtime-8.0→ fixed in8.0.28-0ubuntu1~25.10.1USN-8420-1
```
sudo apt-get install --only-upgrade -y aspnetcore-runtime-8.0
```

Are YOU affected by CVE-2026-45591?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

CVE-2026-45591dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

See StackPatch ($99 lifetime)