CVE-2023-33128 .NET and Visual Studio Remote Code Execution Vulnerability
High 7.3
Published
Updated
Check this codebase for CVE-2023-33128 and fix it if it is affected.
What it is: CVE-2023-33128 is a high-severity use after free vulnerability in Microsoft .Net, published on 13 Jun 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-33128 in the wild and no public exploit code.
Affected packages and fixed versions:
- Microsoft.NETCore.App.Runtime.linux-arm (NuGet): affected from 7.0.0; fixed in 7.0.7
- Microsoft.NETCore.App.Runtime.linux-arm (NuGet): affected from 7.0.0; fixed in 7.0.7
- dotnet (Bitnami): affected from 6.0.0; fixed in 6.0.18, 7.0.7
- dotnet-sdk (Bitnami): affected from 6.0.0; fixed in 6.0.18, 7.0.7
- Microsoft.NETCore.App.Runtime.linux-arm64 (NuGet): affected from 7.0.0; fixed in 7.0.7
- Microsoft.NETCore.App.Runtime.linux-arm64 (NuGet): affected from 7.0.0; fixed in 7.0.7
- Microsoft.NETCore.App.Runtime.linux-musl-arm (NuGet): affected from 7.0.0; fixed in 7.0.7
- Microsoft.NETCore.App.Runtime.linux-musl-arm (NuGet): affected from 7.0.0; fixed in 7.0.7
- Microsoft.NETCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 7.0.0; fixed in 7.0.7
- Microsoft.NETCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 7.0.0; fixed in 7.0.7
- Microsoft.NETCore.App.Runtime.linux-musl-x64 (NuGet): affected from 7.0.0; fixed in 7.0.7
- Microsoft.NETCore.App.Runtime.linux-musl-x64 (NuGet): affected from 7.0.0; fixed in 7.0.7
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2023-33128/ (Markdown: https://insights.sbomify.com/CVE-2023-33128/index.md)
A use-after-free vulnerability in .NET and Visual Studio allows attackers to execute arbitrary code remotely.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-33128?
CVE-2023-33128 is a high-severity use after free vulnerability in Microsoft .Net, published on 13 Jun 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
.NET and Visual Studio Remote Code Execution Vulnerability
Weakness: CWE-416
Which versions are affected by CVE-2023-33128?
26 open source packages ship an affected version, including Microsoft.NETCore.App.Runtime.linux-arm, dotnet and dotnet-sdk. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
Microsoft.NETCore.App.Runtime.linux-arm NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-arm NuGet | From 7.0.0 | 7.0.7 |
dotnet Bitnami | From 6.0.0 | 6.0.18, 7.0.7 |
dotnet-sdk Bitnami | From 6.0.0 | 6.0.18, 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-arm64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-arm64 NuGet | From 7.0.0 | 7.0.7 |
20 more packages
Microsoft.NETCore.App.Runtime.linux-musl-arm NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-musl-arm NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-musl-arm64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-musl-arm64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-musl-x64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-musl-x64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-x64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.linux-x64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.osx-arm64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.osx-arm64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.osx-x64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.osx-x64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.win-arm NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.win-arm NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.win-arm64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.win-arm64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.win-x64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.win-x64 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.win-x86 NuGet | From 7.0.0 | 7.0.7 |
Microsoft.NETCore.App.Runtime.win-x86 NuGet | From 7.0.0 | 7.0.7 |
Products include Microsoft .Net, Microsoft Visual Studio 2022.
How do I fix CVE-2023-33128?
Upgrade Microsoft.NETCore.App.Runtime.linux-arm to 7.0.7 or later.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2023-33128 being exploited?
There is no known exploitation of CVE-2023-33128 in the wild and no public exploit code.
Other vulnerabilities in Microsoft .Net
- CVE-2024-43498 .NET and Visual Studio Remote Code Execution Vulnerability
- CVE-2024-0057 NET, .NET Framework, and Visual Studio Security Feature Bypass Vulnerability
- CVE-2026-96957 .NET Security Feature Bypass Vulnerability
- CVE-2026-69439 .NET and Visual Studio Elevation of Privilege Vulnerability
- CVE-2026-71328 .NET and Visual Studio Remote Code Execution Vulnerability
Sources
Also known as BIT-dotnet-2023-33128, BIT-dotnet-sdk-2023-33128, CLEANSTART-2025-KW09152, GHSA-x469-cv7m-77r9, UBUNTU-CVE-2023-33128.