CVE-2015-6855: hw/ide/core.c in QEMU does not properly restrict the commands accepted by an ATAPI device, which allows gue...

Security readout for executives and security teams

This QEMU flaw lets someone inside a guest VM crash the affected QEMU instance by triggering an IDE/ATAPI handling bug. The main confirmed business impact is denial of service for virtual machines, with sources noting possible unspecified additional impact but not proving it. Exposure is most likely on virtualization hosts or appliances running affected QEMU builds from 2015-era distributions. Debian, Fedora, SUSE, Ubuntu, Gentoo, and Arista references indicate downstream vendor relevance, but the bundle does not enumerate exact affected versions. Address during normal vulnerability remediation, with higher priority for shared virtualization platforms. The confirmed impact is availability loss for affected VM instances, not proven data theft or host takeover in the supplied sources. Mitigation focus: Apply QEMU security updates from the relevant operating-system or appliance vendor.; Prioritize multi-tenant virtualization hosts and systems running untrusted guest workloads.; Check vendor advisories for exact fixed package versions before closing exposure..

Prepared

Jun 13, 2026, 21:45 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.