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
- 2026-07-25T18:24:46.497777541Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X 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 (
mlkem_cmp_avx2) 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
{ "license": "CC-BY-4.0", "sources": [ { "database_specific": { "status": "Modified" }, "published": "2026-06-25T20:17:09.160Z", "imported": "2026-07-17T22:26:13.011Z", "id": "CVE-2026-10097", "modified": "2026-06-26T17:16:31.693Z", "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10097", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-10097" }, { "id": "GHSA-hcgc-hfp6-58v4", "published": "2026-06-25T21:31:30Z", "imported": "2026-07-17T22:26:13.162Z", "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" }, { "id": "EUVD-2026-39553", "published": "2026-06-25T19:59:30Z", "imported": "2026-07-17T22:26:23.073Z", "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-39553", "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39553", "modified": "2026-06-26T16:35:41Z" } ] }- References