CVE-2016-3961 Denial of service in n/a

What is CVE-2016-3961?

CVE-2016-3961 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 15 Apr 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Xen and the Linux kernel through 4.5.x do not properly suppress hugetlbfs support in x86 PV guests, which allows local PV guest OS users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area.

Weakness: CWE-20

Which versions are affected by CVE-2016-3961?

It affects 2 products.

Products include Canonical Ubuntu Linux, Xen Xen.

How do I fix CVE-2016-3961?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2016-3961 being exploited?

There is no known exploitation of CVE-2016-3961 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2016-3961, GHSA-46vh-jm43-r5pj, UBUNTU-CVE-2016-3961.