An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU. The flaw exists in virgl_cmd_get_capset() in contrib/vhost-user-gpu/virgl.c and could occur while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service, or potentially execute arbitrary code on the host with the privileges of the QEMU process. Patch series: https://lists.nongnu.org/archive/html/qemu-devel/2021-05/msg01155.html OOB write in virgl_cmd_get_capset() in virgl.c: https://lists.nongnu.org/archive/html/qemu-devel/2021-05/msg01154.html CREATE(Triage):(User=admin) CVE-2021-3546 (https://nvd.nist.gov/vuln/detail/CVE-2021-3546)
