Out-of-Bounds Affecting xen package, versions <4.4.0-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published29 Jul 2026
- disclosed14 Apr 2016
Introduced: 14 Apr 2016
CVE-2015-8554 (opens in a new tab)How to fix?
Upgrade Echo:latest xen to version 4.4.0-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
Buffer overflow in hw/pt-msi.c in Xen 4.6.x and earlier, when using the qemu-xen-traditional (aka qemu-dm) device model, allows local x86 HVM guest administrators to gain privileges by leveraging a system with access to a passed-through MSI-X capable physical PCI device and MSI-X table entries, related to a "write path."
References
- https://advisory.echohq.com/cve/CVE-2015-8554
- http://support.citrix.com/article/CTX203879
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/79579
- http://www.securitytracker.com/id/1034481
- http://xenbits.xen.org/xsa/advisory-164.html
- https://security.gentoo.org/glsa/201604-03