CVE-2022-2962

A DMA reentrancy issue was found in the Tulip device emulation in QEMU. When Tulip reads or writes to the rx/tx descriptor or copies the rx/tx frame, it doesn't check whether the destination address is its own MMIO address. This can cause the device to trigger MMIO handlers multiple times, possibly leading to a stack or heap overflow. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

A DMA reentrancy issue was found in the Tulip device emulation in QEMU. When Tulip reads or writes to the rx/tx descriptor or copies the rx/tx frame, it doesn't check whether the destination address is its own MMIO address. This can cause the device to trigger MMIO handlers multiple times, possibly leading to a stack or heap overflow. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

Se encontró un problema de reentrada DMA en la emulación del dispositivo Tulip en QEMU. Cuando Tulip lee o escribe en el descriptor rx/tx o copia la trama rx/tx, no comprueba si la dirección de destino es su propia dirección MMIO. Esto puede causar a el dispositivo disparar los manejadores MMIO múltiples veces, posiblemente conllevando a un desbordamiento de la pila (stack, heap). Un huésped malicioso podría usar este fallo para bloquear el proceso QEMU en el host, resultando en una condición de denegación de servicio