CVE-2025-36854 (GCVE-0-2025-36854)
Vulnerability from cvelistv5
Published
2025-09-08 13:53
Modified
2025-09-08 14:01
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-416 - Use After Free
Summary
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 Code Execution.
Per CWE-416: Use After Free https://cwe.mitre.org/data/definitions/416.html , Use After Free is when a product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
This issue affects EOL ASP.NET 6.0.0 <= 6.0.36 as represented in this CVE, as well as 8.0.0 <= 8.0.8, 9.0.0-preview.1.24081.5 <= 9.0.0.RC.1 as represented in CVE-2024-38229 https://www.cve.org/CVERecord .
Additionally, if you've deployed self-contained applications https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.
NOTE: This CVE only represents End Of Life (EOL) software components. The vendor, Microsoft, has indicated there will be no future updates nor support provided upon inquiry.
References
Impacted products
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\"Microsoft.AspNetCore.App.Runtime.osx-x64\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2025-09-03T07:00:00.000Z\", \"references\": [{\"url\": \"https://www.herodevs.com/vulnerability-directory/cve-2024-38229\", \"name\": \".NET and Visual Studio Remote Code Execution Vulnerability\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38229\", \"tags\": [\"vendor-advisory\"]}], \"descriptions\": [{\"lang\": \"en-US\", \"value\": \"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 Code Execution.\\n\\n Per CWE-416: Use After Free https://cwe.mitre.org/data/definitions/416.html , Use After Free is when a product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \\\"belongs\\\" to the code that operates on the new pointer.\\n\\n This issue affects EOL ASP.NET\\u00a06.0.0 \u003c= 6.0.36 as represented in this CVE, as well as\\u00a08.0.0 \u003c= 8.0.8, 9.0.0-preview.1.24081.5 \u003c= 9.0.0.RC.1 as represented in\\u00a0 CVE-2024-38229 https://www.cve.org/CVERecord .\\n\\n Additionally, if you\u0027ve deployed self-contained applications https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd \\u00a0targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.\\n\\n NOTE: This CVE only represents End Of Life (EOL) software components. The vendor, Microsoft, has indicated there will be no future updates nor support provided upon inquiry.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eA vulnerability (\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://www.cve.org/CVERecord?id=CVE-2024-38229\\\"\u003eCVE-2024-38229\u003c/a\u003e) 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 Code Execution.\u003c/p\u003e \u003cp\u003ePer \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://cwe.mitre.org/data/definitions/416.html\\\"\u003eCWE-416: Use After Free\u003c/a\u003e, Use After Free is when a product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \\\"belongs\\\" to the code that operates on the new pointer.\u003c/p\u003e \u003cp\u003eThis issue affects EOL ASP.NET\u0026nbsp;6.0.0 \u0026lt;= 6.0.36 as represented in this CVE, as well as\u0026nbsp;8.0.0 \u0026lt;= 8.0.8, 9.0.0-preview.1.24081.5 \u0026lt;= 9.0.0.RC.1 as represented in\u0026nbsp;\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://www.cve.org/CVERecord?id=CVE-2024-38229\\\"\u003eCVE-2024-38229\u003c/a\u003e.\u003c/p\u003e \u003cp\u003eAdditionally, if you\u0027ve deployed \u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd\\\"\u003eself-contained applications\u003c/a\u003e\u0026nbsp;targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.\u003c/p\u003e \u003cdiv\u003e \u003cdiv\u003e \u003cp\u003eNOTE: This CVE only represents End Of Life (EOL) software components. The vendor, Microsoft, has indicated there will be no future updates nor support provided upon inquiry.\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en-US\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416: Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"36c7be3b-2937-45df-85ea-ca7133ea542c\", \"shortName\": \"HeroDevs\", \"dateUpdated\": \"2025-09-08T13:53:08.619Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-36854\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-09-08T14:01:20.382Z\", \"dateReserved\": \"2025-04-15T23:50:31.198Z\", \"assignerOrgId\": \"36c7be3b-2937-45df-85ea-ca7133ea542c\", \"datePublished\": \"2025-09-08T13:53:08.619Z\", \"assignerShortName\": \"HeroDevs\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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