CVE-2025-34297
CVE-2025-34297 is a high-severity vulnerability with a CVSS 4.0 base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.
Key facts
- Severity: High (CVSS 4.0 base score 8.6)
- EPSS exploit prediction: 0% (4th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-200096
- Weakness: CWE-190
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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 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.
- How severe is CVE-2025-34297?
- CVE-2025-34297 has a CVSS 4.0 base score of 8.6, rated high severity.
- Is CVE-2025-34297 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-34297?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-34297 have an EU (EUVD) identifier?
- Yes. CVE-2025-34297 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200096.
- When was CVE-2025-34297 published?
- CVE-2025-34297 was published on 2025-12-01 and last updated on 2026-06-17.
References
- https://github.com/mborgerding/kissfft/commit/1b08316582049c3716154caefc0deab8758506e3
- https://github.com/mborgerding/kissfft/issues/120
- https://www.vulncheck.com/advisories/kissfft-integer-overflow-heap-buffer-overflow
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