Microsoft .NetCore.App.Runtime.win-x86 up to 6.0.36 msdia140.dll malloc integer overflow

Summaryinfo

A vulnerability was found in Microsoft .NET 6.0, .NetCore.App.Runtime.linux-arm, .NetCore.App.Runtime.linux-arm64, .NetCore.App.Runtime.linux-musl-arm, .NetCore.App.Runtime.linux-musl-arm64, .NetCore.App.Runtime.linux-musl-x64, .NetCore.App.Runtime.linux-x64, .NetCore.App.Runtime.osx-arm64, .NetCore.App.Runtime.osx-x64, .NetCore.App.Runtime.win-arm, .NetCore.App.Runtime.win-arm64, .NetCore.App.Runtime.win-x64 and .NetCore.App.Runtime.win-x86 up to 6.0.36. It has been rated as problematic. Affected by this issue is the function malloc in the library msdia140.dll. This manipulation causes integer overflow. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is handled as CVE-2025-36853. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Microsoft .NET 6.0, .NetCore.App.Runtime.linux-arm, .NetCore.App.Runtime.linux-arm64, .NetCore.App.Runtime.linux-musl-arm, .NetCore.App.Runtime.linux-musl-arm64, .NetCore.App.Runtime.linux-musl-x64, .NetCore.App.Runtime.linux-x64, .NetCore.App.Runtime.osx-arm64, .NetCore.App.Runtime.osx-x64, .NetCore.App.Runtime.win-arm, .NetCore.App.Runtime.win-arm64, .NetCore.App.Runtime.win-x64 and .NetCore.App.Runtime.win-x86 up to 6.0.36. It has been declared as problematic. Affected by this vulnerability is the function malloc in the library msdia140.dll. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability (CVE-2025-21172) exists in msdia140.dll due to integer overflow and heap-based overflow. Per CWE-122: Heap-based Buffer Overflow, a heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().‍ Per CWE-190: Integer Overflow or Wraparound, is when a product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. NOTE: This CVE affects only End Of Life (EOL) software components. The vendor, Microsoft, has indicated there will be no future updates nor support provided upon inquiry.

It is possible to read the advisory at herodevs.com. This vulnerability is known as CVE-2025-36853 since 04/16/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/08/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Microsoft

Name

• .NET 6.0
• .NetCore.App.Runtime.linux-arm
• .NetCore.App.Runtime.linux-arm64
• .NetCore.App.Runtime.linux-musl-arm
• .NetCore.App.Runtime.linux-musl-arm64
• .NetCore.App.Runtime.linux-musl-x64
• .NetCore.App.Runtime.linux-x64
• .NetCore.App.Runtime.osx-arm64
• .NetCore.App.Runtime.osx-x64
• .NetCore.App.Runtime.win-arm
• .NetCore.App.Runtime.win-arm64
• .NetCore.App.Runtime.win-x64
• .NetCore.App.Runtime.win-x86

Version

• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.0.6
• 6.0.7
• 6.0.8
• 6.0.9
• 6.0.10
• 6.0.11
• 6.0.12
• 6.0.13
• 6.0.14
• 6.0.15
• 6.0.16
• 6.0.17
• 6.0.18
• 6.0.19
• 6.0.20
• 6.0.21
• 6.0.22
• 6.0.23
• 6.0.24
• 6.0.25
• 6.0.26
• 6.0.27
• 6.0.28
• 6.0.29
• 6.0.30
• 6.0.31
• 6.0.32
• 6.0.33
• 6.0.34
• 6.0.35
• 6.0.36

License

• commercial

Support

• end of life

Website

• Vendor: https://www.microsoft.com/

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