CVE-2012-3516: n/a vulnerability

CVE-2012-3516: The GNTTABOP_swap_grant_ref sub-operation in the grant table hypercall in Xen 4.2 and Citrix XenServer 6.0....

The GNTTABOP_swap_grant_ref sub-operation in the grant table hypercall in Xen 4.2 and Citrix XenServer 6.0.2 allows local guest kernels or administrators to cause a denial of service (host crash) and possibly gain privileges via a crafted grant reference that triggers a write to an arbitrary hypervisor memory location.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 20:05 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw affects Xen-based virtualization hosts. A privileged user inside a guest VM could trigger a host crash and may gain elevated hypervisor privileges. The main business concern is disruption or cross-tenant risk on older Xen or Citrix XenServer deployments. Exposure is most likely on legacy Xen 4.2 or Citrix XenServer 6.0.2 hosts, especially where guest administrators or untrusted guest kernels exist. Public-facing services are not the direct entry point; the attacker position is inside a guest VM. Treat this as high priority for any remaining legacy Xen infrastructure. It is not remotely exploitable from the internet based on the provided sources, but it can threaten host availability and tenant isolation when an attacker controls a guest VM. Mitigation focus: Check Xen XSA-18, Citrix CTX134708, and SUSE guidance for vendor remediation details.; Prioritize replacing or updating Xen 4.2 and Citrix XenServer 6.0.2 hosts.; Avoid placing untrusted tenants on potentially affected hypervisors until remediated..

Prepared: Jun 24, 2026, 12:04 UTC (UTC+00:00)

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: Nov 23, 2012, 20:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

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CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

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