CVE-2026-32203
Highdotnet: .NET: Denial of Service via stack overflow
Published Apr 14, 2026 · Updated Oct 15, 2026 · Also known as BIT-dotnet-2026-32203, BIT-dotnet-sdk-2026-32203, EUVD-2026-22591, GHSA-6588-8gv4-xfgh, ROOT-APP-NUGET-CVE-2026-32203, UBUNTU-CVE-2026-32203
Key Facts
Patch in the next maintenance window- CVE-2026-32203 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting .net (Microsoft), Visual Studio 2022 (Microsoft), Visual Studio 2026 (Microsoft) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 2.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including .NET 10.0 10.0.6, .NET 8.0 8.0.26, .NET 9.0 9.0.15.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
2.4%
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2026-32203 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Stack-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to deny service over a network.
Affected Products
335 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| .netMicrosoft | 10.0.0, 8.0.0, 9.0.0 | 10.0.6 |
| Visual Studio 2022Microsoft | See advisory | 17.12.19 |
| Visual Studio 2026Microsoft | See advisory | 18.4.4 |
| azure-functions-hostminimos | See advisory | 4.1053.100-r0 |
| dotnet-10minimos | See advisory | 10.0.107-r0 |
Patched Releases
.NET 10.0
10.0.6
.NET 8.0
8.0.26
.NET 9.0
9.0.15
aspnetcore-runtime-10.0
10.0.6-0ubuntu1~24.04.1, 10.0.6-0ubuntu1~25.10.1, 10.0.6-1.0.1.el10_1, 10.0.6-1.0.1.el8_10, 10.0.6-1.0.1.el9_7, 10.0.6-1.amzn2023.0.1, 10.0.7-0ubuntu1~26.04.1
aspnetcore-runtime-8.0
8.0.26-0ubuntu1~22.04.1, 8.0.26-0ubuntu1~24.04.1, 8.0.26-0ubuntu1~25.10.1, 8.0.26-1.0.1.el10_1, 8.0.26-1.0.1.el8_10, 8.0.26-1.0.1.el9_7, 8.0.26-1.amzn2023.0.1
aspnetcore-runtime-9.0
9.0.15-0ubuntu1~25.10.1, 9.0.15-1.0.1.el10_1, 9.0.15-1.0.1.el8_10, 9.0.15-1.0.1.el9_7, 9.0.15-1.amzn2023.0.1
aspnetcore-runtime-dbg-10.0
10.0.6-0ubuntu1~24.04.1, 10.0.6-0ubuntu1~25.10.1, 10.0.6-1.0.1.el10_1, 10.0.6-1.0.1.el8_10, 10.0.6-1.0.1.el9_7, 10.0.6-1.amzn2023.0.1, 10.0.7-0ubuntu1~26.04.1
aspnetcore-runtime-dbg-8.0
8.0.26-0ubuntu1~22.04.1, 8.0.26-0ubuntu1~24.04.1, 8.0.26-0ubuntu1~25.10.1, 8.0.26-1.0.1.el10_1, 8.0.26-1.0.1.el8_10, 8.0.26-1.0.1.el9_7, 8.0.26-1.amzn2023.0.1
aspnetcore-runtime-dbg-9.0
9.0.15-0ubuntu1~25.10.1, 9.0.15-1.0.1.el10_1, 9.0.15-1.0.1.el8_10, 9.0.15-1.0.1.el9_7, 9.0.15-1.amzn2023.0.1
aspnetcore-targeting-pack-10.0
10.0.6-0ubuntu1~24.04.1, 10.0.6-0ubuntu1~25.10.1, 10.0.6-1.0.1.el10_1, 10.0.6-1.0.1.el8_10, 10.0.6-1.0.1.el9_7, 10.0.6-1.amzn2023.0.1, 10.0.7-0ubuntu1~26.04.1
aspnetcore-targeting-pack-8.0
8.0.26-0ubuntu1~22.04.1, 8.0.26-0ubuntu1~24.04.1, 8.0.26-0ubuntu1~25.10.1, 8.0.26-1.0.1.el10_1, 8.0.26-1.0.1.el8_10, 8.0.26-1.0.1.el9_7, 8.0.26-1.amzn2023.0.1
aspnetcore-targeting-pack-9.0
9.0.15-0ubuntu1~25.10.1, 9.0.15-1.0.1.el10_1, 9.0.15-1.0.1.el8_10, 9.0.15-1.0.1.el9_7, 9.0.15-1.amzn2023.0.1
azure-functions-host
4.1053.100-r0
dotnet
10.0.106-1.0.1.el8_10, 10.0.106-1.amzn2023.0.1, 10.0.6, 8.0.126-1.amzn2023.0.1, 8.0.26, 9.0.116-1.amzn2023.0.1, 9.0.15
dotnet-10
10.0.107-r0
dotnet-8
8.0.119-r0
dotnet-9
9.0.109-r0
dotnet-apphost-pack-10.0
10.0.6-0ubuntu1~24.04.1, 10.0.6-0ubuntu1~25.10.1, 10.0.6-1.0.1.el10_1, 10.0.6-1.0.1.el8_10, 10.0.6-1.0.1.el9_7, 10.0.6-1.amzn2023.0.1, 10.0.7-0ubuntu1~26.04.1
dotnet-apphost-pack-8.0
8.0.26-0ubuntu1~22.04.1, 8.0.26-0ubuntu1~24.04.1, 8.0.26-0ubuntu1~25.10.1, 8.0.26-1.0.1.el10_1, 8.0.26-1.0.1.el8_10, 8.0.26-1.0.1.el9_7, 8.0.26-1.amzn2023.0.1
dotnet-apphost-pack-9.0
9.0.15-0ubuntu1~25.10.1, 9.0.15-1.0.1.el10_1, 9.0.15-1.0.1.el8_10, 9.0.15-1.0.1.el9_7, 9.0.15-1.amzn2023.0.1
dotnet-host
10.0.6-1.0.1.el10_1, 10.0.6-1.0.1.el8_10, 10.0.6-1.0.1.el9_7, 10.0.6-1.amzn2023.0.1, 8.0.26-1.amzn2023.0.1, 9.0.15-1.amzn2023.0.1
dotnet-host-10.0
10.0.6-0ubuntu1~24.04.1, 10.0.6-0ubuntu1~25.10.1, 10.0.7-0ubuntu1~26.04.1
dotnet-host-8.0
8.0.26-0ubuntu1~22.04.1, 8.0.26-0ubuntu1~24.04.1, 8.0.26-0ubuntu1~25.10.1
dotnet-host-9.0
9.0.15-0ubuntu1~25.10.1
dotnet-hostfxr-10.0
10.0.6-0ubuntu1~24.04.1, 10.0.6-0ubuntu1~25.10.1, 10.0.6-1.0.1.el10_1, 10.0.6-1.0.1.el8_10, 10.0.6-1.0.1.el9_7, 10.0.6-1.amzn2023.0.1, 10.0.7-0ubuntu1~26.04.1
Timeline
Publicly disclosed
Apr 14, 2026
Last updated
Oct 15, 2026
Weakness Type
- CWE-20 Improper Input Validation
- CWE-121 Stack-based Buffer Overflow
- CWE-787 Out-of-bounds Write
References
- advisoryRHSA-2026:13280
- advisoryRHSA-2026:13281
- advisoryRHSA-2026:13282
- advisoryRHSA-2026:13283
- advisoryRHSA-2026:13693
FAQ
Common Questions.
Stack-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to deny service over a network.
Affected: .net (Microsoft) versions 10.0.0, 8.0.0, 9.0.0; Visual Studio 2022 (Microsoft); Visual Studio 2026 (Microsoft), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including .NET 10.0 10.0.6, .NET 8.0 8.0.26, .NET 9.0 9.0.15.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
Is CVE-2026-32203 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo