CVE-2017-7539: Qemu

High severity, CVSS 7.5. EPSS: 5.5% chance of exploitation in the next 30 days.

An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.

Affected products

• Qemu Qemu: before 2.10.1 (fixed in 2.10.1)
• Red Hat Openstack: version 6.0 only; version 7.0 only; version 8 only; version 9 only; version 10 only; version 11 only
• Red Hat Virtualization: version 4.0 only; version 3.0 only

Published 2018-07-26. Last modified 2026-06-17.