Use After Free in Microsoft Microsoft.aspnetcore.app.runtime.linux-arm
CVE-2025-36854
A vulnerability ( CVE-2024-38229 https://www.cve.org/CVERecord ) exists in EOL ASP.NET when closing an HTTP/3 stream while application code is writing to the response body, a race condition may lead to use-after-free, resulting in Remote C…
Vulnerability class: Use-After-Free
EPSS: 0.003 (55.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Microsoft.aspnetcore.app.runtime.linux-arm — versions >=6.0.0
- Microsoft Microsoft.aspnetcore.app.runtime.linux-arm64 — versions >=6.0.0
- Microsoft Microsoft.aspnetcore.app.runtime.linux-musl-arm — versions >=6.0.0
- Microsoft Microsoft.aspnetcore.app.runtime.linux-musl-arm64 — versions >=6.0.0
- Microsoft Microsoft.aspnetcore.app.runtime.linux-musl-x64 — versions >=6.0.0
- Microsoft Microsoft.aspnetcore.app.runtime.linux-x64 — versions >=6.0.0
- Microsoft Microsoft.aspnetcore.app.runtime.osx-arm64 — versions >=6.0.0
- Microsoft Microsoft.aspnetcore.app.runtime.osx-x64 — versions >=6.0.0
- Microsoft Microsoft.aspnetcore.app.runtime.win-arm — versions >=6.0.0
- Microsoft Microsoft.aspnetcore.app.runtime.win-arm64 — versions >=6.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- .NET and Visual Studio Remote Code Execution Vulnerability (third-party-advisory)
- msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38229 (vendor-advisory)
Frequently asked questions
- What is CVE-2025-36854?
- CVE-2025-36854 is a high-severity vulnerability in Microsoft Microsoft.aspnetcore.app.runtime.linux-arm, classified under Use After Free. CVSS score: 8.1/10. Published 2025-09-08.
- How severe is CVE-2025-36854?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2025-36854 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.