# Microsoft Security Advisory CVE-2024-38229 | .NET Remote Code Execution Vulnerability Advisory record · `GHSA-7vw9-cfwx-9gx9` - **Identifiers:** `GHSA-7vw9-cfwx-9gx9` · `BIT-dotnet-2024-38229` · `BIT-dotnet-sdk-2024-38229` · `CVE-2024-38229` - **State:** Confirmed - **Severity:** CVSS 8.1 High - **Critical:** No - **Weakness (CWE):** [CWE-362](https://cwe.mitre.org/data/definitions/362.html) · [CWE-416](https://cwe.mitre.org/data/definitions/416.html) - **Tags:** [Race condition](https://agentprime.io/advisories/tag/race-condition.md) · [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md) - **Published:** 8 Oct 2024 - **Updated:** 6 May 2025 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 8 Oct 2024, 17:43 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Affected packages - `Microsoft.AspNetCore.App.Runtime.linux-arm` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.linux-arm64` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.linux-musl-arm` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.linux-musl-arm64` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.linux-musl-x64` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.linux-x64` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.osx-arm64` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.osx-x64` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.win-arm` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.win-arm64` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.win-x64` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` - `Microsoft.AspNetCore.App.Runtime.win-x86` (NuGet): affected `>=9.0.0-preview.1.24081.5, <9.0.0-rc.2.24474.3 || >=8.0.0, <8.0.10`; fixed in `9.0.0-rc.2.24474.3`, `8.0.10` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > Microsoft.AspNetCore.App.Runtime packages for .NET 8.0 before 8.0.10 and for 9.0 preview builds before 9.0.0-rc.2.24474.3 are affected, including the linux, osx, and win runtime variants. A use-after-free caused by a race condition occurs when an HTTP/3 stream is closed while application code is writing to the response body, and the source does not describe what an attacker can achieve beyond remote code execution. HTTP/3 is not enabled by default. Upgrade to 8.0.10 or 9.0.0-rc.2.24474.3. Written 9 Nov 2026. ## Not analysed yet We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check. ## Severity and exploitation - 8.1 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`, from CNA (microsoft) - **CISA KEV:** Not listed. - **EPSS:** 0.021, the 81st percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 8 Oct 2024, 17:23 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/dotnet/aspnetcore/security/advisories/GHSA-7vw9-cfwx-9gx9) - 31 Oct 2026, 15:22 UTC: First seen by agentprime - 31 Oct 2026, 15:22 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-7vw9-cfwx-9gx9) ## Sources - [GitHub Advisory Database: GHSA-7vw9-cfwx-9gx9](https://github.com/advisories/GHSA-7vw9-cfwx-9gx9) - [OSV: GHSA-7vw9-cfwx-9gx9](https://osv.dev/vulnerability/GHSA-7vw9-cfwx-9gx9) - - - - - - - - - Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code. ## Check whether this affects you A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet. - With the agentprime MCP server (), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .