Stack-based buffer overflow in Microsoft products - CVE-2026-32203

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Main Vulnerability Database Vulnerabilities #VU126242

Stack-based buffer overflow in Microsoft products - CVE-2026-32203

Published: April 15, 2026


Vulnerability identifier: #VU126242
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-32203
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in .NET and Visual Studio. A remote unauthenticated attacker can trigger stack-based buffer overflow and cause a denial of service condition on the target system.


Affected software

.NET for macOS
.NET for Linux
Visual Studio
.NET
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Ubuntu
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
dotnet10 (Ubuntu package)
dotnet8.0 (Red Hat package)
dotnet8.0
dotnet9.0 (Red Hat package)
dotnet9.0
dotnet10.0 (Red Hat package)
dotnet10.0

How to mitigate CVE-2026-32203

Install updates from vendor's website.

.NET for macOS - addressed in versions 8.0.26, 9.0.15
.NET for Linux - addressed in versions 8.0.26, 9.0.15
.NET - addressed in versions 8.0.26, 9.0.15
Visual Studio - update to 17.12.19
dotnet10 (Ubuntu package) - addressed in versions 8.0.26-0ubuntu1~22.04.1, 8.0.26-0ubuntu1~24.04.1, 8.0.26-0ubuntu1~25.10.1, 8.0.126-0ubuntu1~22.04.1, 8.0.126-0ubuntu1~24.04.1, 8.0.126-0ubuntu1~25.10.1, 8.0.126-8.0.26-0ubuntu1~22.04.1, 8.0.126-8.0.26-0ubuntu1~24.04.1, 8.0.126-8.0.26-0ubuntu1~25.10.1, 9.0.15-0ubuntu1~25.10.1, 9.0.116-0ubuntu1~25.10.1, 9.0.116-9.0.15-0ubuntu1~25.10.1, 10.0.6-0ubuntu1~24.04.1, 10.0.6-0ubuntu1~25.10.1, 10.0.7-0ubuntu1~26.04.1, 10.0.106-0ubuntu1~24.04.1, 10.0.106-0ubuntu1~25.10.1, 10.0.106-10.0.6-0ubuntu1~24.04.1, 10.0.106-10.0.6-0ubuntu1~25.10.1, 10.0.107-0ubuntu1~26.04.1, 10.0.107-10.0.7-0ubuntu1~26.04.1
dotnet8.0 (Red Hat package) - addressed in versions 8.0.126-1.el8_10, 8.0.126-1.el9_4, 8.0.126-1.el9_6, 8.0.126-1.el9_7, 8.0.126-1.el10_0, 8.0.126-1.el10_1
dotnet8.0 - addressed in versions 8.0.126-1.fc42, 8.0.126-1.fc43, 8.0.126-1.fc44
dotnet9.0 (Red Hat package) - addressed in versions 9.0.116-1.el8_10, 9.0.116-1.el10_0, 9.0.116-1.el10_1
dotnet9.0 - addressed in versions 9.0.116-1.fc42, 9.0.116-1.fc43, 9.0.116-1.fc44
dotnet10.0 (Red Hat package) - update to 10.0.106-1.el8_10
dotnet10.0 - addressed in versions 10.0.106-1.fc42, 10.0.106-1.fc43, 10.0.106-1.fc44

External References

Related Security Bulletins