Use-after-free vulnerability in DBD::mysql before 4.029 allows attackers to cause a denial of service (program crash) or possibly execute arbitrary code via vectors related to a lost server connection.
https://rt.cpan.org/Public/Bug/Display.html?id=97625
https://github.com/perl5-dbi/DBD-mysql/commit/a56ae87a4c1c1fead7d09c3653905841ccccf1cc
http://www.securityfocus.com/bid/92149
http://www.openwall.com/lists/oss-security/2016/07/27/6
http://www.openwall.com/lists/oss-security/2016/07/27/5
http://www.debian.org/security/2016/dsa-3635
http://cpansearch.perl.org/src/CAPTTOFU/DBD-mysql-4.029/ChangeLog