Xen Security Advisory 510 v3 (CVE-2026-79602) - x86: improper handling of HVM emulation return codes
Xen Project released XSA-510 (CVE-2026-79602) fixing mishandled HVM emulation return codes that let PCI-passthrough guests crash Xen.
Xen Security Advisory 510 v3 publicly discloses CVE-2026-79602, improper handling of HVM emulation return codes in the Xen hypervisor on x86. A guest with an assigned PCI device that has at least one BAR in the IO port space can trigger a BUG() in Xen. The advisory was released publicly as version 3.
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