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This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability

SYNTHESIS OF THE VULNERABILITY

Impacted products: openSUSE Leap, QEMU, SLES, Ubuntu.

Severity: 2/4.

Consequences: data reading, denial of service on server, denial of
service on service.

Provenance: user shell.

Confidence: confirmed by the editor (5/5).

Creation date: 13/01/2021.

DESCRIPTION OF THE VULNERABILITY

An attacker, inside a guest system, can force a read at an invalid
address via iscsi_aio_ioctl_cb() of QEMU, in order to trigger a
denial of service, or to obtain sensitive information on the host
system.

ACCESS TO THE FULL VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/QEMU-out-of-bounds-memory-reading-via-iscsi-aio-ioctl-cb-34309