An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.
Exploitability
AV:NAC:HPR:LUI:NScope
S:CImpact
C:LI:LA:H7.7/CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:HOther