How severe is CVE-2012-3516?

CVE-2012-3516 has a CVSS 2.0 base score of 6.9, rated medium severity.

Is CVE-2012-3516 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-3516?

CVE-2012-3516 primarily affects Citrix Xenserver. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-3516?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-3516 published?

CVE-2012-3516 was published on 2012-11-23 and last updated on 2026-06-16.

CVE-2012-3516

CVE-2012-3516 is a medium-severity vulnerability in Citrix Xenserver with a CVSS 2.0 base score of 6.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 6.9)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Citrix Xenserver
Published: 2012-11-23
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2012-3516?: 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.
How severe is CVE-2012-3516?: CVE-2012-3516 has a CVSS 2.0 base score of 6.9, rated medium severity.
Is CVE-2012-3516 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-3516?: CVE-2012-3516 primarily affects Citrix Xenserver. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-3516?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-3516 published?: CVE-2012-3516 was published on 2012-11-23 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*
cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:*

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