mborgerding kissfft kiss_fftndr.c kiss_fftndr_alloc integer overflow

Summaryinfo

A vulnerability was found in mborgerding kissfft. It has been declared as critical. Affected by this vulnerability is the function kiss_fftndr_alloc of the file kiss_fftndr.c. Executing a manipulation can lead to integer overflow. This vulnerability is handled as CVE-2026-41445. The attack can be executed remotely. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical was found in mborgerding kissfft (version now known). This vulnerability affects the function kiss_fftndr_alloc of the file kiss_fftndr.c. 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. CVE summarizes:

KissFFT before commit 8a8e66e contains an integer overflow vulnerability in the kiss_fftndr_alloc() function in kiss_fftndr.c where the allocation size calculation dimOther*(dimReal+2)*sizeof(kiss_fft_scalar) overflows signed 32-bit integer arithmetic before being widened to size_t, causing malloc() to allocate an undersized buffer. Attackers can trigger heap buffer overflow by providing crafted dimensions that cause the multiplication to exceed INT_MAX, allowing writes beyond the allocated buffer region when kiss_fftndr() processes the data.

The weakness was released by Sajeeb Lohani as 8a8e66e33d692bad1376fe7904d87d767730537f. The advisory is shared for download at github.com. This vulnerability was named CVE-2026-41445 since 04/20/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Applying the patch 8a8e66e33d692bad1376fe7904d87d767730537f is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-23905). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• mborgerding

Name

• kissfft

License

• open-source

Website

• Product: https://github.com/mborgerding/kissfft/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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