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vulnerabilities
Xen Security Advisory 510 v3 (CVE-2026-79602) - x86: improper handling of HVM emulation return codes
Xen Security Advisory 510 (CVE-2026-79602) addresses improper handling of hypervisor emulation return codes on x86 systems. A guest with a passed-through PCI device that has a Base Address Register in IO port space can trigger a bug in Xen, leading to potential denial of service.
Why it matters: Xen administrators running virtualized infrastructure with PCI device passthrough must apply this patch to prevent guest-triggered crashes that could disrupt hosted workloads.
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- First seen by Cybersecurity Tracker