CVE-2025-34297: Mborgerding/kissfft

High severity, CVSS 8.6. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Mborgerding/kissfft Mborgerding/kissfft

Published 2025-12-01. Last modified 2026-07-14.