GnuPG before 1.4.14, and Libgcrypt before 1.5.3 as used in GnuPG 2.0.x and possibly other products, allows local users to obtain private RSA keys via a cache side-channel attack involving the L3 cache, aka Flush+Reload.
bugs.debian.org/cgi-bin/bugreport.cgi?bug=717880
eprint.iacr.org/2013/448
kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
lists.gnupg.org/pipermail/gnupg-announce/2013q3/000330.html
lists.opensuse.org/opensuse-updates/2013-08/msg00003.html
rhn.redhat.com/errata/RHSA-2013-1457.html
secunia.com/advisories/54318
secunia.com/advisories/54321
secunia.com/advisories/54332
secunia.com/advisories/54375
www.debian.org/security/2013/dsa-2730
www.debian.org/security/2013/dsa-2731
www.kb.cert.org/vuls/id/976534
www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
www.securityfocus.com/bid/61464
www.ubuntu.com/usn/USN-1923-1