Heap buffer overflow via undersized transform allocation
Published Apr 20, 2026 · Updated Apr 20, 2026
Heap buffer overflow in KISS FFT before commit 8a8e66e allows attackers to overwrite heap memory through crafted transform dimensions. The kiss_fftndr_alloc() function computes dimOther*(dimReal+2)*sizeof(kiss_fft_scalar) in signed 32-bit arithmetic before widening the result to size_t, so malloc() reserves an undersized temporary buffer. Exploitation requires a consuming application to pass attacker-controlled dimensions and then process data with kiss_fftndr(), which writes beyond the allocation and can corrupt the hosting process.
Summary
What happened
Heap buffer overflow in KISS FFT before commit 8a8e66e allows attackers to overwrite heap memory through crafted transform dimensions. The kiss_fftndr_alloc() function computes dimOther*(dimReal+2)*sizeof(kiss_fft_scalar) in signed 32-bit arithmetic before widening the result to size_t, so malloc() reserves an undersized temporary buffer. Exploitation requires a consuming application to pass attacker-controlled dimensions and then process data with kiss_fftndr(), which writes beyond the allocation and can corrupt the hosting process.
The record
- CVE
- CVE-2026-41445
- Published
- Apr 20, 2026
- Updated
- Apr 20, 2026
- Vendor
- Mark Borgerding
- Product
- KISS FFT
- Classifications
- CWE-190, CWE-122
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 20, 2026CVE publishedPublication date reported by the CVE source.
- Apr 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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- Affected versionversion=0 <8a8e66e33d692bad1376fe7904d87d767730537f
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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Public exploit references
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Technologies
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Your stack
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