CVE WatchJul 14, 2026

CVE-2025-34297

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

CVSS

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No CVSS

EPSS

0.1%

KEV

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Exploit Today

0-100

Published: Dec 1, 2025 · Last modified: Jul 14, 2026 · CWE-190

EPSS · 30d

0.1%EPSS · 30 days0.1%

2026-06-302026-07-16

Technical description

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.

Official references

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