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CVE-2025-34297 — KissFFT Integer Overflow Heap Buffer Overflow via kiss_fft_alloc

Affected: mborgerding/kissfft

KissFFT versions prior to the fix commit 1b083165 contain an integer overflow in kiss_fft_alloc() in kiss_fft.c on platforms where size_t is 32-bit. The nfft parameter is not validated before being used in a size calculation (sizeof(kiss_fft_cpx) * (nfft - 1)), which can wrap to a small value when nfft is large. As a result, malloc() allocates an undersized buffer and the subsequent twiddle-factor initialization loop writes nfft elements, causing a heap buffer overflow. This vulnerability only affects 32-bit architectures.

USN-8745-1 — kissfft vulnerabilities

Affected: Ubuntu:Pro:22.04:LTS: kissfft, Ubuntu:Pro:24.04:LTS: kissfft, Ubuntu:Pro:26.04:LTS: kissfft

It was discovered that KissFFT incorrectly handled certain large Fourier transform sizes on 32-bit architectures. An attacker could possibly use this issue to cause KissFFT to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2025-34297)

It was discovered that KissFFT incorrectly handled certain multidimensional Fourier transform sizes. An attacker could possibly use this issue to cause KissFFT to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-41445)