CVE-2015-4176 Information disclosure in n/a

Medium 5.5 Published Updated

Local attackers with user-namespace root access can read arbitrary files due to improper mount connectivity handling in the Linux kernel.

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-2015-4176?

CVE-2015-4176 is a medium-severity vulnerability in Linux kernel, published on 2 May 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

fs/namespace.c in the Linux kernel before 4.0.2 does not properly support mount connectivity, which allows local users to read arbitrary files by leveraging user-namespace root access for deletion of a file or directory.

Weakness: CWE-200

Which versions are affected by CVE-2015-4176?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2015-4176?

Upgrade to a fixed version.

Is CVE-2015-4176 being exploited?

There is no known exploitation of CVE-2015-4176 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as GHSA-7254-j3fq-v7pj.

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