{"id":"JLSEC-2025-221","summary":"Use of a Broken or Risky Cryptographic Algorithm in the function `mbedtls_mpi_exp_mod()` in lignum.c...","details":"Use of a Broken or Risky Cryptographic Algorithm in the function `mbedtls_mpi_exp_mod()` in lignum.c in Mbed TLS Mbed TLS all versions before 3.0.0, 2.27.0 or 2.16.11 allows attackers with access to precise enough timing and memory access information (typically an untrusted operating system attacking a secure enclave such as SGX or the TrustZone secure world) to recover the private keys used in RSA.","modified":"2026-07-25T18:23:58.260884357Z","published":"2025-11-21T15:59:04.054Z","upstream":["CVE-2021-36647"],"database_specific":{"license":"CC-BY-4.0","sources":[{"html_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36647","database_specific":{"status":"Modified"},"id":"CVE-2021-36647","imported":"2026-07-17T20:46:37.922Z","modified":"2026-06-17T03:58:59.387Z","published":"2023-01-17T21:15:10.880Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-36647"}]},"references":[{"type":"WEB","url":"https://github.com/ARMmbed/mbedtls/releases/"},{"type":"WEB","url":"https://kouzili.com/Load-Step.pdf"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/06/msg00034.html"},{"type":"WEB","url":"https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-07-1"}],"affected":[{"package":{"name":"MbedTLS_jll","ecosystem":"Julia","purl":"pkg:julia/MbedTLS_jll?uuid=c8ffd9c3-330d-5841-b78e-0817d7145fa1"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.27.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2025/JLSEC-2025-221.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}