The ML-KEM ARM64 NEON ciphertext comparison only compares half of the input, breaking the Fujisaki-Okamoto transform's implicit rejection and weakening IND-CCA2 security on that code path. The constant-time comparison effectively ignored part of the re-encrypted ciphertext, so a decapsulating party could fail to detect a manipulated ciphertext and proceed without the standard's required implicit rejection.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| wolfSSL | wolfSSL | unaffected |
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History
Thu, 25 Jun 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | The ML-KEM ARM64 NEON ciphertext comparison only compares half of the input, breaking the Fujisaki-Okamoto transform's implicit rejection and weakening IND-CCA2 security on that code path. The constant-time comparison effectively ignored part of the re-encrypted ciphertext, so a decapsulating party could fail to detect a manipulated ciphertext and proceed without the standard's required implicit rejection. | |
| Title | ML-KEM ARM64 NEON ciphertext comparison only compares half of the input | |
| Weaknesses | CWE-327 | |
| References |
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| Metrics |
cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: wolfSSL
Published:
Updated: 2026-06-25T21:01:19.563Z
Reserved: 2026-04-15T03:08:30.514Z
Link: CVE-2026-6330
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