CVE-2020-15863

A buffer overflow vulnerability was found in the XGMAC Ethernet controller of the QEMU emulator. This flaw occurs during packet transmission and affects the highbank and midway emulated machines. A guest user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential code execution with the privileges of the QEMU process.

The XGMAC device can only be found on highbank and midway QEMU ARM emulated machines. This flaw did not affect the following versions of QEMU as they did not include support for XGMAC:

• qemu-kvm-ma as shipped with Red Hat Enterprise Linux 7.
• qemu-kvm-rhev as shipped with Red Hat Virtualization and Red Hat OpenStack.
• qemu-kvm as shipped with Red Hat Enterprise Linux 6, 7 and 8.
• virt:8.2/qemu-kvm as shipped with RHEL Advanced Virtualization.

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.