# CVE-2024-21386: .NET Denial of Service Vulnerability - **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C`) - **Exploited in the wild:** Not known - **Fix available:** Yes - **Published:** 13 Feb 2024 - **Updated:** 10 Aug 2026 - **Also known as:** BELL-CVE-2024-21386, BIT-aspnet-core-2024-21386, CLEANSTART-2025-QC74254, GHSA-g74q-5xw3-j7q9, UBUNTU-CVE-2024-21386 ## What is CVE-2024-21386? CVE-2024-21386 is a high-severity vulnerability in Microsoft Visual Studio 2022, published on 13 Feb 2024. ### Official description .NET Denial of Service Vulnerability Weakness: CWE-400 (Uncontrolled Resource Consumption) ## Which versions are affected by CVE-2024-21386? 40 open source packages ship an affected version, including Microsoft.AspNetCore.App.Runtime.linux-arm, aspnet-core and Microsoft.AspNetCore.App.Runtime.linux-arm64. It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `Microsoft.AspNetCore.App.Runtime.linux-arm` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-arm` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-arm` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-arm` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-arm` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-arm` | NuGet | From 8.0.0 | 8.0.2 | | `aspnet-core` | Bitnami | From 6.0.0 | 6.0.27, 7.0.16, 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-arm64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-arm64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-arm64` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-arm64` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-arm64` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-arm64` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-x64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-x64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-x64` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-x64` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-x64` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-musl-x64` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-x64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-x64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.linux-x64` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-x64` | NuGet | From 7.0.0 | 7.0.16 | | `Microsoft.AspNetCore.App.Runtime.linux-x64` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.linux-x64` | NuGet | From 8.0.0 | 8.0.2 | | `Microsoft.AspNetCore.App.Runtime.osx-arm64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.osx-arm64` | NuGet | All versions | 6.0.27 | | `Microsoft.AspNetCore.App.Runtime.osx-arm64` | NuGet | From 7.0.0 | 7.0.16 | Products: Microsoft Asp.net Core, Microsoft Visual Studio 2022. ## How do I fix CVE-2024-21386? Upgrade Microsoft.AspNetCore.App.Runtime.linux-arm to a fixed version for your release line: 6.0.27, 7.0.16 or 8.0.2. ## Is CVE-2024-21386 being exploited? There is no known exploitation of CVE-2024-21386 in the wild and no public exploit code. ## Other vulnerabilities in Microsoft Visual Studio 2022 - [CVE-2025-55315](https://insights.sbomify.com/CVE-2025-55315/): ASP.NET Security Feature Bypass Vulnerability (critical 9.9) - [CVE-2026-88092](https://insights.sbomify.com/CVE-2026-88092/): ASP.NET Core Tampering Vulnerability (critical 9.4) - [CVE-2026-40372](https://insights.sbomify.com/CVE-2026-40372/): ASP.NET Core Elevation of Privilege Vulnerability (critical 9.1) - [CVE-2021-43877](https://insights.sbomify.com/CVE-2021-43877/): ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability (high 8.8) - [CVE-2020-0603](https://insights.sbomify.com/CVE-2020-0603/): Remote code execution in ASP.NET Core (high 8.8) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2024-21386 and fix it if it is affected. What it is: CVE-2024-21386 is a high-severity vulnerability in Microsoft Visual Studio 2022, published on 13 Feb 2024. Exploitation: There is no known exploitation of CVE-2024-21386 in the wild and no public exploit code. Affected packages and fixed versions: - Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected all versions; fixed in 6.0.27 - Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected all versions; fixed in 6.0.27 - Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 7.0.0; fixed in 7.0.16 - Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 7.0.0; fixed in 7.0.16 - Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 8.0.0; fixed in 8.0.2 - Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 8.0.0; fixed in 8.0.2 - aspnet-core (Bitnami): affected from 6.0.0; fixed in 6.0.27, 7.0.16, 8.0.2 - Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected all versions; fixed in 6.0.27 - Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected all versions; fixed in 6.0.27 - Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 7.0.0; fixed in 7.0.16 - Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 7.0.0; fixed in 7.0.16 - Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 8.0.0; fixed in 8.0.2 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-2024-21386/ (Markdown: https://insights.sbomify.com/CVE-2024-21386/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2024-21386 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-21386 - OSV: https://osv.dev/vulnerability/CVE-2024-21386 --- From sbomify Insights: https://insights.sbomify.com/CVE-2024-21386/ Summaries are generated and may contain mistakes; the official description above is the record.