CVE-2015-7835 Privilege escalation in n/a

High 7.2 Published 30 Oct 2015 Updated 6 Aug 2024

Local PV guest administrators can gain privileges via crafted superpage mappings due to improper validation of level 2 page table entries in Xen.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2015-7835?

CVE-2015-7835 is a high-severity vulnerability in Xen Xen, published on 30 Oct 2015. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-264, CWE-20

Which versions are affected by CVE-2015-7835?

It affects 1 product.

Products include Xen Xen.

How do I fix CVE-2015-7835?

Apply the vendor's patch.

Is CVE-2015-7835 being exploited?

There is no known exploitation of CVE-2015-7835 in the wild and no public exploit code.

All Xen Xen vulnerabilities

Sources

Also known as DEBIAN-CVE-2015-7835, DSA-3390-1, GHSA-4rfc-hjfx-gw3f, UBUNTU-CVE-2015-7835.