CVE-2021-3545

An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host.

This issue does not affect the versions of qemu-kvm as shipped with Red Hat Enterprise Linux 6, 7 and 8, as Virgl was not enabled in these versions. Support for Virgl was enabled as technical preview in Red Hat Enterprise Linux Advanced Virtualization 8.2, and later disabled in Red Hat Enterprise Linux Advanced Virtualization 8.3.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.