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Vulnerability of QEMU: NULL pointer dereference via fdctrl_read_data/fdctrl_write_data

Synthesis of the vulnerability 

An attacker, inside a guest system, can force a NULL pointer to be dereferenced via fdctrl_read_data/fdctrl_write_data() of QEMU, in order to trigger a denial of service on the host system.
Impacted products: QEMU.
Severity of this bulletin: 1/4.
Creation date: 29/09/2020.
Références of this threat: CVE-2020-25741, VIGILANCE-VUL-33447.

Description of the vulnerability 

An attacker, inside a guest system, can force a NULL pointer to be dereferenced via fdctrl_read_data/fdctrl_write_data() of QEMU, in order to trigger a denial of service on the host system.
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This security note impacts software or systems such as QEMU.

Our Vigil@nce team determined that the severity of this threat announce is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this computer weakness announce.

Solutions for this threat 

QEMU: patch for fdctrl_read_data/fdctrl_write_data.
A patch is indicated in information sources.
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