CVE-2015-2756
EPSS 0.12%
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.
How to fix CVE-2015-2756
To remediate CVE-2015-2756, upgrade the affected package to a fixed version below.
- Debian/qemu—upgrade to 1:2.3+dfsg-3 or later
- Debian/xen—upgrade to 4.2.0~rc2-1 or later
Is CVE-2015-2756 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1:2.3+dfsg-3
- from 0, < 4.2.0~rc2-1