A vulnerability was discovered in SPICE before 0.13.90 in the server's protocol handling. An authenticated attacker could send crafted messages to the SPICE server causing a heap overflow leading to a crash or possible code execution.
https://www.debian.org/security/2017/dsa-3790
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-9577
https://access.redhat.com/errata/RHSA-2017:0552
https://access.redhat.com/errata/RHSA-2017:0254
http://www.securityfocus.com/bid/96040