JLSEC-2026-693
- Source
- https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-693.md
- Import Source
- https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-693.json
- JSON Data
- https://api.osv.dev/v1/vulns/JLSEC-2026-693
- Upstream
- Published
- 2026-07-14T21:41:35.775Z
- Modified
- 2026-07-14T21:50:15.441589033Z
- Severity
-
- 8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- ML-KEM-1024 x64 AVX2 implicit rejection failure in the Fujisaki-Okamoto transform breaks IND-CCA2...
- Details
-
wolfSSL's AVX2-optimized ML-KEM implementation (mlkemcmpavx2) compares only 1536 of the 1568 ciphertext bytes during the Fujisaki-Okamoto re-encryption check in ML-KEM-1024 decapsulation. Ciphertexts that differ from the expected re-encryption solely in bytes 1536-1567 bypass implicit rejection and are accepted as valid, breaking IND-CCA2 security. An attacker able to submit chosen ciphertexts to a decapsulation oracle that uses a static ML-KEM-1024 key, and to observe whether the genuine shared secret or the implicit-rejection secret was produced, can use this as a plaintext-checking oracle to recover the private key. A proof of concept recovered a full ML-KEM-1024 private key with approximately 98% success using roughly 350 chosen ciphertexts. The flaw is a deterministic logic error and does not rely on timing measurements.
- Database specific
{ "sources": [ { "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10097", "modified": "2026-06-26T17:16:31.693Z", "published": "2026-06-25T20:17:09.160Z", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-10097", "imported": "2026-07-14T21:22:49.547Z", "id": "CVE-2026-10097", "database_specific": { "status": "Modified" } }, { "url": "https://api.github.com/advisories/GHSA-hcgc-hfp6-58v4", "html_url": "https://github.com/advisories/GHSA-hcgc-hfp6-58v4", "modified": "2026-06-26T18:34:51Z", "imported": "2026-07-14T21:22:58.060Z", "published": "2026-06-25T21:31:30Z", "id": "GHSA-hcgc-hfp6-58v4" }, { "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-39553", "published": "2026-06-25T19:59:30Z", "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39553", "imported": "2026-07-14T21:22:51.069Z", "id": "EUVD-2026-39553", "modified": "2026-06-26T16:35:41Z" } ], "license": "CC-BY-4.0" }- References