CVE-2012-3495
EPSS 0.08%
Description
The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.
How to fix CVE-2012-3495
To remediate CVE-2012-3495, upgrade the affected package to a fixed version below.
- Debian/xen—upgrade to 4.1.3-2 or later
Is CVE-2012-3495 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 4.1.3-2