{"id":"CVE-2025-34297","title":"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","summary":"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…","severity":"none","cwe":["CWE-190"],"published":"2025-12-01","updated":"2026-07-14","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-34297","references":[{"url":"https://github.com/mborgerding/kissfft/commit/1b08316582049c3716154caefc0deab8758506e3","label":"disclosure@vulncheck.com"},{"url":"https://github.com/mborgerding/kissfft/issues/120","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/kissfft-integer-overflow-heap-buffer-overflow","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00165,"epssPercentile":0.05128,"ingestedAt":"2026-07-15T13:44:03.525Z","slug":"CVE-2025-34297","body":"## Overview\n\nKissFFT 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}