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CVE-2015-8338

7.2 · HIGH

Xen 4.6.x and earlier does not properly enforce limits on page order inputs for the (1) XENMEM_increase_reservation, (2) XENMEM_populate_physmap, (3) XENMEM_exchange, and possibly other HYPERVISOR_…

Published Dec 17, 2015xenCWE-254EPSS 0.42%

Overview

CVE-2015-8338 is a high-severity vulnerability affecting xen xen. It was published on December 17, 2015 and has a CVSS 2.0 base score of 7.2 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Xen 4.6.x and earlier does not properly enforce limits on page order inputs for the (1) XENMEM_increase_reservation, (2) XENMEM_populate_physmap, (3) XENMEM_exchange, and possibly other HYPERVISOR_memory_op suboperations, which allows ARM guest OS administrators to cause a denial of service (CPU consumption, guest reboot, or watchdog timeout and host reboot) and possibly have unspecified other impact via unknown vectors.

Remediation

Check the references section for vendor advisories and patches from xen. Update xen to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
xenxen0Affected

References

Refwww.debian.org/security/2016/dsa-3633Refwww.securityfocus.com/bid/78920Refwww.securitytracker.com/id/1034390Refxenbits.xen.org/xsa/advisory-158.htmlRefwww.debian.org/security/2016/dsa-3633Refwww.securityfocus.com/bid/78920Refwww.securitytracker.com/id/1034390Refxenbits.xen.org/xsa/advisory-158.html

How CyberStrike helps

Frequently asked questions

What is CVE-2015-8338?

CVE-2015-8338 is a high-severity vulnerability affecting xen xen. It was published on December 17, 2015 and has a CVSS 2.0 base score of 7.2 (HIGH).

How severe is CVE-2015-8338?

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-8338?

Check the references section for vendor advisories and patches from xen. Update xen to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-8338?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-8338 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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