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CVE Record

CVE-2018-10471: An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (...

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2018-10471 is a Xen hypervisor denial-of-service flaw. A user inside an x86 PV guest could trigger an out-of-bounds zero write that crashes the hypervisor. For businesses, the concern is availability: one guest could disrupt the host and other workloads sharing it.

Executive priority

Prioritize remediation for shared or externally managed virtualization hosts. A successful attack affects availability at the hypervisor layer, so the business impact can extend beyond one guest workload. Lower urgency may be reasonable only where Xen PV guests are absent or the affected versions are not deployed.

Technical view

Xen through 4.10.x mishandled unexpected INT 80 processing after an incorrect fix for CVE-2017-5754. The reported impact is an out-of-bounds zero write leading to hypervisor crash, reachable by x86 PV guest OS users. The provided sources do not include CVSS, CWE, or detailed patch mechanics.

Likely exposure

Exposure is most likely on Xen deployments through 4.10.x that run x86 PV guests. Environments using Debian or Gentoo Xen packages should check the referenced distro advisories. The bundle does not establish exposure for non-PV guests or non-Xen hypervisors.

Exploitation context

The source bundle describes guest-user-triggered denial of service but does not cite public exploitation, exploit availability, or CISA KEV listing. Treat this as a host availability risk, especially where untrusted or tenant-controlled guests run on shared Xen infrastructure.

Researcher notes

The strongest technical evidence in the bundle is the CVE description and Xen XSA-259 reference. Missing details include CVSS, CWE mapping, exact fixed versions, and exploit telemetry. Avoid assuming broader guest types, confidentiality impact, or active exploitation without additional vendor evidence.

Mitigation direction

  • Review Xen XSA-259 and applicable distro advisories for official remediation.
  • Apply vendor-provided Xen security updates from your platform or distribution.
  • Prioritize hosts running Xen through 4.10.x with x86 PV guests.
  • Reduce exposure from untrusted PV guests where operationally feasible.
  • Confirm maintenance plans cover hypervisor reboots after update installation.

Validation and detection

  • Inventory Xen hypervisor versions and flag systems through 4.10.x.
  • Identify whether any affected hosts run x86 PV guests.
  • Verify Debian, Gentoo, or vendor Xen security updates are installed.
  • Review host history for unexplained Xen hypervisor crashes or reboots.
  • Confirm vulnerability records are tied to XSA-259 in tracking systems.
Prepared
Confidence
medium
Sources
6

Public sources used

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

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2018-10471 mapping review

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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

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.