CVE-2015-7835
xen - security update
EPSS 0.10%
Description
The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.
How to fix CVE-2015-7835
To remediate CVE-2015-7835, upgrade the affected package to a fixed version below.
- Debian/xen—upgrade to 4.6.0-1 or later
- Debian/xen—upgrade to 4.1.4-3+deb7u9 or later
Is CVE-2015-7835 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.6.0-1
- from 0, < 4.1.4-3+deb7u9