Bug 2529756 (CVE-2026-79602)

Summary: CVE-2026-79602 xen: Xen: Denial of Service due to improper handling of HVM emulation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Xen. A malicious guest operating system, when configured with a PCI device that has a Base Address Register (BAR) mapped to the I/O port space, can trigger an internal error within the Xen hypervisor. This vulnerability could lead to a denial of service, causing the host system to become unresponsive.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2529851    
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Description OSIDB Bzimport 2026-09-08 12:40:52 UTC
A guest with a PCI device assigned that has at least a BAR on the IO port
space can trigger a BUG() in Xen.