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.

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PT-2020-6458

Name of the Vulnerable Software and Affected Versions QEMU versions prior to 5.0.0 Description The issue is related to an integer overflow in the SM501 display driver implementation, specifically in the COPY AREA macro while handling MMIO write operations through the sm501 2d engine write callbac...