Use-after-free vulnerability in the create_smp_dialog function in gtk-dialog.c in the Off-the-Record Messaging (OTR) pidgin-otr plugin before 4.0.2 for Pidgin allows remote attackers to execute arbitrary code via vectors related to the "Authenticate buddy" menu item.
https://security.gentoo.org/glsa/201701-10
https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002582.html
https://bugs.otr.im/issues/128
https://blog.fuzzing-project.org/39-Heap-use-after-free-in-Pidgin-OTR-plugin-CVE-2015-8833.html
http://www.securityfocus.com/bid/84295
http://www.openwall.com/lists/oss-security/2016/03/09/8
http://www.openwall.com/lists/oss-security/2016/03/09/13
http://www.debian.org/security/2016/dsa-3528
http://lists.opensuse.org/opensuse-updates/2016-03/msg00109.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00095.html