Use-after-free vulnerability in kbx/keybox-blob.c in GPGSM in GnuPG 2.x through 2.0.16 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a certificate with a large number of Subject Alternate Names, which is not properly handled in a realloc operation when importing the certificate or verifying its signature.
http://www.debian.org/security/2010/dsa-2076
http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00001.html
http://lists.gnupg.org/pipermail/gnupg-announce/2010q3/000302.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-August/044935.html