CVE-2016-9191 Denial of service in n/a

Medium 5.5 Published Updated

Local users in a container can cause a system hang via mishandled cgroup drain operations, requiring kernel patches.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Local or same network only
Victim action needed
Not needed
Fix
Available

What is CVE-2016-9191?

CVE-2016-9191 is a medium-severity denial of service vulnerability in Linux kernel, published on 28 Nov 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The cgroup offline implementation in the Linux kernel through 4.8.11 mishandles certain drain operations, which allows local users to cause a denial of service (system hang) by leveraging access to a container environment for executing a crafted application, as demonstrated by trinity.

Weakness: CWE-399, CWE-20

Which versions are affected by CVE-2016-9191?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2016-9191?

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-2016-9191 being exploited?

There is no known exploitation of CVE-2016-9191 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as DEBIAN-CVE-2016-9191, GHSA-v46g-28c9-hw6q, UBUNTU-CVE-2016-9191.

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