Libgcrypt is vulnerable to information disclosure. An attacker who learns the EdDSA session key can recover the long-term secret key.
www.debian.org/security/2017/dsa-3880
www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
www.securityfocus.com/bid/99046
bugzilla.suse.com/show_bug.cgi?id=1042326
git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=5a22de904a0a366ae79f03ff1e13a1232a89e26b
git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=f9494b3f258e01b6af8bd3941ce436bcc00afc56
security-tracker.debian.org/tracker/CVE-2017-9526
www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html