Bug 2508030 (CVE-2026-62434)

Summary: CVE-2026-62434 xen: Xen: Memory corruption via guest reclaiming special pages with Populated on Demand (PoD) enabled
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Xen. When a guest operating system is started with Populated on Demand (PoD) enabled, it can attempt to reclaim memory pages that are not regular guest RAM. This action can lead to the corruption of Xen's memory management state, potentially causing system instability or denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2508141    
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Description OSIDB Bzimport 2026-07-28 14:02:52 UTC 
A guest started with Populated on Demand enabled (PoD) can attempt to
reclaim pages which aren't regular guest RAM.  This can cause corruption
of memory management state in Xen.