CVE-2025-34297
KissFFT Integer Overflow Heap Buffer Overflow via kiss_fft_alloc
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
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Patch and advisory references
References (3)
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CVSS
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