CVE-2015-2756

xen: unmediated PCI command register access in qemu (xsa126)

Published Apr 1, 2015 CVSS 2.0 · 4.9 Medium EPSS < 1% KEV · Not listed
Description
QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-479-1 xen security update
Debian DSA Debian DSA DSA-3259-1 qemu security update
EUVD EUVD EUVD-2015-2846 QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response.
Ubuntu USN Ubuntu USN USN-2608-1 QEMU vulnerabilities
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 6, 2024, 5:24 AM
Reserved
Mar 27, 2015, 12:00 AM
Status
Modified
Published
Apr 1, 2015, 2:59 PM
Modified
Jun 17, 2026, 12:24 AM
Severity
Moderate
Public date
Mar 31, 2015, 12:00 AM