CVE-2026-79602

A flaw exists in the Xen hypervisor where a malicious guest operating system with an assigned PCI device featuring a Base Address Register (BAR) mapped to the I/O port space can trigger an internal BUG() . This vulnerability is caused by the improper handling of HVM emulation return codes . The i...

UBUNTU-CVE-2026-79602

A guest with a PCI device assigned that has at least a BAR on the IO port space can trigger a BUG in Xen...

CVE-2026-79602

A guest with a PCI device assigned that has at least a BAR on the IO port space can trigger a BUG in Xen...

x86: improper handling of HVM emulation return codes

ISSUE DESCRIPTION A guest with a PCI device assigned that has at least a BAR on the IO port space can trigger a BUG in Xen. IMPACT Passing through a PCI device with at least one BAR in IO address space to unprivileged HVM guests can result in a Denial of Service DoS affecting the entire host...