The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.1.1a (Affected 1.1.1).
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.oracle.com/security-alerts/cpujan2020.html
https://www.openssl.org/news/secadv/20181029.txt
https://www.debian.org/security/2018/dsa-4348
https://usn.ubuntu.com/3840-1/
https://security.netapp.com/advisory/ntap-20181105-0002/
https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/
https://lists.debian.org/debian-lts-announce/2018/11/msg00024.html
https://access.redhat.com/errata/RHSA-2019:3700