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CVE Record

CVE-2013-1917: Xen 3.1 through 4.x, when running 64-bit hosts on Intel CPUs, does not clear the NT flag when using an IRET...

Xen 3.1 through 4.x, when running 64-bit hosts on Intel CPUs, does not clear the NT flag when using an IRET after a SYSENTER instruction, which allows PV guest users to cause a denial of service (hypervisor crash) by triggering a #GP fault, which is not properly handled by another IRET instruction.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This issue lets a user inside a Xen paravirtualized guest crash the Xen hypervisor under specific host conditions. For affected virtualization hosts, the business impact is availability: one guest-triggered crash can disrupt the host and other workloads running on it. Exposure is limited to Xen 3.1 through 4.x deployments running 64-bit hosts on Intel CPUs with paravirtualized guests. The bundle does not identify affected package versions by distribution beyond advisory references. Treat this as urgent for affected virtualization clusters, especially shared hosting or cloud environments. The primary risk is service outage, not data theft, but a hypervisor crash can have broad operational impact. Mitigation focus: Apply vendor-supported Xen updates from the relevant distribution advisory.; Review Xen Security Advisory 44 and distribution guidance before scheduling changes.; Prioritize shared or multi-tenant Xen hosts with untrusted PV guests..

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Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

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Source materials

Affected products

Products and packages named in the record

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