CVE-2020-12829: Canonical Ubuntu Linux

Low severity, CVSS 3.8. EPSS: 0.4% chance of exploitation in the next 30 days.

In QEMU through 5.0.0, an integer overflow was found in the SM501 display driver implementation. This flaw occurs in the COPY_AREA macro while handling MMIO write operations through the sm501_2d_engine_write() callback. A local attacker could abuse this flaw to crash the QEMU process in sm501_2d_operation() in hw/display/sm501.c on the host, resulting in a denial of service.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 20.04 only
• Debian Debian Linux: version 10.0 only
• Qemu Qemu: up to and including 5.0.1

Published 2020-08-31. Last modified 2026-06-17.