Description
Improper authorization in .NET allows an authorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | .NET 10.0 runtime | 10.0.0 – < 10.0.9 | 10.0.9 |
| Microsoft | .NET 8.0 runtime | 8.0.0 – < 8.0.28 | 8.0.28 |
| Microsoft | .NET 9.0 runtime | 9.0.0 – < 9.0.17 | 9.0.17 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | dotnet7 | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet10-runtime | 10.0.9-r0 | — |
| Alpine v3.24 | dotnet8-runtime | 8.0.28-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.17-r0 | — |
| Alpine v3.23 | dotnet10-runtime | 10.0.9-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.28-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.17-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.28-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.17-r0 | — |
| Alpine v3.21 | dotnet9-runtime | 9.0.17-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | dotnet +5 | 8.0.128-1.amzn2023.0.1 | ALAS2023-2026-1869, ALAS2023-2026-1868, ALAS2023-2026-1867 |
| Amazon Linux 2023 | dotnet-host +8 | 8.0.28-1.amzn2023.0.1 | ALAS2023-2026-1869, ALAS2023-2026-1868, ALAS2023-2026-1867 |
| Amazon Linux 2023 | dotnet-hostfxr-10.0 +7 | 10.0.9-1.amzn2023.0.1 | ALAS2023-2026-1867 |
| Amazon Linux 2023 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.amzn2023.0.2 | ALAS2023-2026-1868 |
| Amazon Linux 2023 | dotnet-sdk-10.0 +4 | 10.0.109-1.amzn2023.0.1 | ALAS2023-2026-1867 |
| Amazon Linux 2023 | dotnet-sdk-9.0 +4 | 9.0.118-1.amzn2023.0.2 | ALAS2023-2026-1868 |
Advisories 6
- WID-SEC-2026-1845 Microsoft DeveloperTools: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 16, 2026
- ALAS2023-2026-1867 Important: dotnet10.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- ALAS2023-2026-1868 Important: dotnet9.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- ALAS2023-2026-1869 Important: dotnet8.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- NCSC-2026-0184 Kwetsbaarheden verholpen in Microsoft Developer Tools NCSC-NL (Netherlands) · Jun 9, 2026
- MSRC-CVE-2026-45490 .NET SDK Elevation of Privilege Vulnerability Microsoft Security Response Center · Jun 9, 2026
References
- .NET SDK Elevation of Privilege Vulnerability vendor-advisory patch