Vulnerability · Published Apr 14, 2026 · Assigned by microsoft
CVE-2026-32203.NET and Visual Studio Denial of Service Vulnerability
High 7.5
In plain English
A high-severity stack buffer overflow in Microsoft Visual Studio 2022 version 17.12 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.9% (higher than 80% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.9%top 20.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Stack-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to deny service over a network.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | aspnetcore-runtime-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | aspnetcore-runtime-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | aspnetcore-runtime-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | aspnetcore-runtime-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | aspnetcore-runtime-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | aspnetcore-runtime-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | aspnetcore-runtime-dbg-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | aspnetcore-runtime-dbg-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | aspnetcore-runtime-dbg-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | aspnetcore-targeting-pack-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | aspnetcore-targeting-pack-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | aspnetcore-targeting-pack-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | aspnetcore-targeting-pack-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | aspnetcore-targeting-pack-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | aspnetcore-targeting-pack-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:8 | dotnet-apphost-pack-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-apphost-pack-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-apphost-pack-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-apphost-pack-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-apphost-pack-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-apphost-pack-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-host | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:8 | dotnet-hostfxr-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-hostfxr-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-hostfxr-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-hostfxr-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-hostfxr-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-hostfxr-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-runtime-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-runtime-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-runtime-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-runtime-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-runtime-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-runtime-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-runtime-dbg-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-runtime-dbg-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-runtime-dbg-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-runtime-dbg-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-runtime-dbg-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-runtime-dbg-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-sdk-10.0 | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:8 | dotnet-sdk-10.0-source-built-artifacts | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-sdk-8.0 | 8.0.126-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-sdk-8.0 | 8.0.126-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-sdk-8.0 | 8.0.126-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-sdk-8.0-source-built-artifacts | 8.0.126-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-sdk-8.0-source-built-artifacts | 8.0.126-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-sdk-8.0-source-built-artifacts | 8.0.126-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-sdk-9.0 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-sdk-9.0 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:10 | dotnet-sdk-9.0-source-built-artifacts | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-sdk-9.0-source-built-artifacts | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-sdk-aot-10.0 | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-sdk-aot-9.0 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-sdk-aot-9.0 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-sdk-dbg-10.0 | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-sdk-dbg-8.0 | 8.0.126-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-sdk-dbg-8.0 | 8.0.126-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-sdk-dbg-8.0 | 8.0.126-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-sdk-dbg-9.0 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-sdk-dbg-9.0 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-targeting-pack-10.0 | 10.0.6-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-targeting-pack-8.0 | 8.0.26-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-targeting-pack-8.0 | 8.0.26-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-targeting-pack-8.0 | 8.0.26-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-targeting-pack-9.0 | 9.0.15-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-targeting-pack-9.0 | 9.0.15-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:8 | dotnet-templates-10.0 | 10.0.106-1.el8_10 | ALSA-2026:8473 |
| AlmaLinux:10 | dotnet-templates-8.0 | 8.0.126-1.el10_1 | ALSA-2026:8470 |
| AlmaLinux:8 | dotnet-templates-8.0 | 8.0.126-1.el8_10 | ALSA-2026:8468 |
| AlmaLinux:9 | dotnet-templates-8.0 | 8.0.126-1.el9_7 | ALSA-2026:8469 |
| AlmaLinux:10 | dotnet-templates-9.0 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | dotnet-templates-9.0 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| AlmaLinux:10 | netstandard-targeting-pack-2.1 | 9.0.116-1.el10_1 | ALSA-2026:8472 |
| AlmaLinux:8 | netstandard-targeting-pack-2.1 | 9.0.116-1.el8_10 | ALSA-2026:8475 |
| NuGet | system.security.cryptography.xml | 9.0.15 | GHSA-6588-8gv4-xfgh |
| NuGet | system.security.cryptography.xml | 8.0.3 | GHSA-6588-8gv4-xfgh |
| NuGet | system.security.cryptography.xml | 10.0.6 | GHSA-6588-8gv4-xfgh |
| Rocky Linux:10 | dotnet10.0 | 0:10.0.106-1.el10_1 | RLSA-2026:8467 |
| Rocky Linux:8 | dotnet10.0 | 0:10.0.106-1.el8_10 | RLSA-2026:8473 |
| Rocky Linux:9 | dotnet10.0 | 0:10.0.106-1.el9_7 | RLSA-2026:8471 |
| Rocky Linux:10 | dotnet8.0 | 0:8.0.126-1.el10_1 | RLSA-2026:8470 |
| Rocky Linux:8 | dotnet8.0 | 0:8.0.126-1.el8_10 | RLSA-2026:8468 |
| Rocky Linux:9 | dotnet8.0 | 0:8.0.126-1.el9_7 | RLSA-2026:8469 |
| Rocky Linux:10 | dotnet9.0 | 0:9.0.116-1.el10_1 | RLSA-2026:8472 |
| Rocky Linux:8 | dotnet9.0 | 0:9.0.116-1.el8_10 | RLSA-2026:8475 |
| Rocky Linux:9 | dotnet9.0 | 0:9.0.116-1.el9_7 | RLSA-2026:8474 |
| Ubuntu:24.04:LTS | dotnet10 | 10.0.106-10.0.6-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-32203 |
| Ubuntu:25.10 | dotnet10 | 10.0.106-10.0.6-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-32203 |
| Ubuntu:26.04:LTS | dotnet10 | 10.0.107-10.0.7-0ubuntu1~26.04.1 | UBUNTU-CVE-2026-32203 |
| Ubuntu:26.10 | dotnet10 | 10.0.107-10.0.7-0ubuntu1~26.04.1 | UBUNTU-CVE-2026-32203 |
| Ubuntu:22.04:LTS | dotnet6 | no fix listed | UBUNTU-CVE-2026-32203 |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-32203 |
| Ubuntu:22.04:LTS | dotnet8 | 8.0.126-8.0.26-0ubuntu1~22.04.1 | UBUNTU-CVE-2026-32203 |
| Ubuntu:24.04:LTS | dotnet8 | 8.0.126-8.0.26-0ubuntu1~24.04.1 | UBUNTU-CVE-2026-32203 |
| Ubuntu:25.10 | dotnet8 | 8.0.126-8.0.26-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-32203 |
| Ubuntu:25.10 | dotnet9 | 9.0.116-9.0.15-0ubuntu1~25.10.1 | UBUNTU-CVE-2026-32203 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 10.0 | 10.0.0 – before 10.0.6 |
| Microsoft | .NET 8.0 | 8.0.0 – before 8.0.26 |
| Microsoft | .NET 9.0 | 9.0.0 – before 9.0.15 |
| Microsoft | Microsoft Visual Studio 2022 version 17.12 | 17.12.0 – before 17.12.19 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 – before 17.14.30 |
| Microsoft | Microsoft Visual Studio 2026 version 18.4 | 18.4.0 – before 18.4.4 |
Weakness: CWE-121, CWE-20, CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
References
- .NET and Visual Studio Denial of Service Vulnerability vendor-advisory, patch
- https://access.redhat.com/security/cve/CVE-2026-32203 vdb-entry, x_refsource_REDHAT
- RHBZ#2457740 issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32203.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:13281 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13280 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8467 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8470 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8472 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8473 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8468 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8475 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13693 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13283 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:13282 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8471 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8469 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:8474 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:9077 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:9080 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:9205 vendor-advisory, x_refsource_REDHAT