Description
Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | .NET 10.0 | 10.0.0 – < 10.0.8 | 10.0.8 |
| Microsoft | .NET 8.0 | 8.0.0 – < 8.0.27 | 8.0.27 |
| Microsoft | .NET 9.0 | 9.0.0 – < 9.0.16 | 9.0.16 |
| Microsoft | Microsoft .NET Framework 3.5 | 3.5.0 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 | 4.7.0 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 | 4.8.0 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 | 4.8.1 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 | 4.7.0 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft .NET Framework 4.8 | 4.8.0 – < 4.8.9334.0 and 4.8.4802.0 | 4.8.9334.0 and 4.8.4802.0 |
| Microsoft | Microsoft Visual Studio 2022 version 17.12 | 17.12.0 – < 17.12.20 | 17.12.20 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – < 17.14.32 | 17.14.32 |
| Microsoft | Microsoft Visual Studio 2026 version 18.5 | 18.5.0 – < 18.5.3 | 18.5.3 |
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 | 10.0.8-r0 | — |
| Alpine v3.24 | dotnet8-runtime | 8.0.27-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.16-r0 | — |
| Alpine v3.23 | dotnet10-runtime | 10.0.8-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.27-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.16-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.27-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.16-r0 | — |
| Alpine v3.21 | dotnet8-runtime | 8.0.27-r0 | — |
| Alpine v3.21 | dotnet9-runtime | 9.0.16-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | dotnet +5 | 8.0.127-1.amzn2023.0.1 | ALAS2023-2026-1804, ALAS2023-2026-1803, ALAS2023-2026-1802 |
| Amazon Linux 2023 | dotnet-host +8 | 8.0.27-1.amzn2023.0.1 | ALAS2023-2026-1804, ALAS2023-2026-1803, ALAS2023-2026-1802 |
| Amazon Linux 2023 | dotnet-hostfxr-10.0 +7 | 10.0.8-1.amzn2023.0.1 | ALAS2023-2026-1803 |
| Amazon Linux 2023 | dotnet-hostfxr-9.0 +7 | 9.0.16-1.amzn2023.0.2 | ALAS2023-2026-1802 |
| Amazon Linux 2023 | dotnet-sdk-10.0 +4 | 10.0.108-1.amzn2023.0.1 | ALAS2023-2026-1803 |
| Amazon Linux 2023 | dotnet-sdk-9.0 +4 | 9.0.117-1.amzn2023.0.2 | ALAS2023-2026-1802 |
Advisories 6
- WID-SEC-2026-1488 Microsoft Developer Tools: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 27, 2026
- MSRC-CVE-2026-32177 .NET Elevation of Privilege Vulnerability Microsoft Security Response Center · Jun 19, 2026
- ALAS2023-2026-1802 Important: dotnet9.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- ALAS2023-2026-1803 Important: dotnet10.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- ALAS2023-2026-1804 Important: dotnet8.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- NCSC-2026-0143 Kwetsbaarheden verholpen in Microsoft Developer Tools NCSC-NL (Netherlands) · May 12, 2026
References
- .NET Elevation of Privilege Vulnerability vendor-advisory patch