How severe is CVE-2008-3687?

CVE-2008-3687 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2008-3687 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-3687?

CVE-2008-3687 primarily affects Xen. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-3687?

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

When was CVE-2008-3687 published?

CVE-2008-3687 was published on 2008-08-14 and last updated on 2026-06-16.

CVE-2008-3687

CVE-2008-3687 is a medium-severity vulnerability in Xen with a CVSS 2.0 base score of 6.8. 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-119.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Xen
Published: 2008-08-14
Last modified: 2026-06-16

Description

Heap-based buffer overflow in the flask_security_label function in Xen 3.3, when compiled with the XSM:FLASK module, allows unprivileged domain users (domU) to execute arbitrary code via the flask_op hypercall.

Frequently asked questions

What is CVE-2008-3687?: Heap-based buffer overflow in the flask_security_label function in Xen 3.3, when compiled with the XSM:FLASK module, allows unprivileged domain users (domU) to execute arbitrary code via the flask_op hypercall.
How severe is CVE-2008-3687?: CVE-2008-3687 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2008-3687 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-3687?: CVE-2008-3687 primarily affects Xen. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-3687?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-3687 published?: CVE-2008-3687 was published on 2008-08-14 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:xen:xen:3.3:*:*:*:*:*:*:*
cpe:2.3:a:xen:xen_flask_module:*:*:*:*:*:*:*:*

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