Bug 2508021 (CVE-2026-62433)

Summary: CVE-2026-62433 xen: Xen: Information disclosure via improper buffer validation in DM_OP hypercalls
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. The DM_OP handling code in Xen does not properly validate the number of buffers provided by the caller. This oversight can lead to the system accessing uninitialized memory, potentially resulting in information disclosure or other unpredictable behavior. A malicious guest operating system could exploit this to read sensitive data from the hypervisor's memory.
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Bug Depends On: 2508144    
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Description OSIDB Bzimport 2026-07-28 14:02:27 UTC 
Parts of the DM_OP handling code assumes the caller has provided the
required number of buffers for the given operation without any checking
being done.  As a result, certain operations might access stack
rubble as structures are possibly uninitialized.