The parse_instruction function in gallium/auxiliary/tgsi/tgsi_text.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (out-of-bounds array access and process crash) via a crafted texture instruction.
https://security.gentoo.org/glsa/201707-06
https://lists.freedesktop.org/archives/virglrenderer-devel/2017-February/000145.html
http://www.securityfocus.com/bid/95782