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CVE Record

CVE-2018-10982: An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users to cause a denial of service...

An issue was discovered in Xen through 4.10.x allowing x86 HVM guest OS users to cause a denial of service (unexpectedly high interrupt number, array overrun, and hypervisor crash) or possibly gain hypervisor privileges by setting up an HPET timer to deliver interrupts in IO-APIC mode, aka vHPET interrupt injection.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2018-10982 affects Xen virtualization. A user inside an x86 HVM guest could trigger a hypervisor failure, potentially crashing host virtualization services, and the description notes possible hypervisor privilege gain. This matters most where Xen hosts untrusted or customer-controlled virtual machines.

Executive priority

Treat as high priority for Xen-based virtualization, especially shared hosting or customer VM platforms. The realistic business impact is host crash and service outage, with possible guest-to-hypervisor privilege impact noted but not fully evidenced in the provided data.

Technical view

The issue is vHPET interrupt injection in Xen through 4.10.x. An x86 HVM guest can configure an HPET timer for IO-APIC interrupt delivery, leading to an unexpectedly high interrupt number, array overrun, and hypervisor crash, with possible hypervisor privilege escalation noted by the CVE description.

Likely exposure

Exposure is likely limited to Xen hypervisors through 4.10.x running x86 HVM guests. Environments without Xen, without x86 HVM guests, or already on vendor-fixed Xen packages are less likely exposed. The provided affected product metadata is incomplete.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The attack position is a guest OS user on an affected Xen x86 HVM guest, making multi-tenant or less-trusted guest environments higher concern.

Researcher notes

The CVE data lacks CVSS, CWE, and structured affected CPEs. Analysis relies on the CVE description and advisory references. Validate exact fixed versions from XSA-261 and distribution advisories before declaring remediation complete.

Mitigation direction

  • Apply Xen security updates from the relevant distribution or Xen vendor guidance.
  • Review Xen XSA-261 and linked Debian or Gentoo advisories for fixed package status.
  • Prioritize hosts running untrusted or customer-controlled x86 HVM guests.
  • Restrict access to affected guest environments until patch status is confirmed.

Validation and detection

  • Inventory Xen hypervisors and identify versions through 4.10.x.
  • Confirm whether x86 HVM guests are enabled on each Xen host.
  • Check installed Xen packages against Debian, Gentoo, or vendor security advisories.
  • Document patched, non-applicable, and still-exposed hosts for remediation tracking.
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.

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CVE-2018-10982 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
6Source 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.