CVE-2016-4805 Use after free in n/a

What is CVE-2016-4805?

CVE-2016-4805 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 23 May 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Use-after-free vulnerability in drivers/net/ppp/ppp_generic.c in the Linux kernel before 4.5.2 allows local users to cause a denial of service (memory corruption and system crash, or spinlock) or possibly have unspecified other impact by removing a network namespace, related to the ppp_register_net_channel and ppp_unregister_channel functions.

Weakness: CWE-416

Which versions are affected by CVE-2016-4805?

It affects 12 products.

Products include Canonical Ubuntu Linux, Linux kernel, Novell Opensuse Leap, Novell Suse Linux Enterprise Desktop, Novell Suse Linux Enterprise Live Patching, Novell Suse Linux Enterprise Module for Public Cloud and 6 more.

How do I fix CVE-2016-4805?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2016-4805 being exploited?

There is no known exploitation of CVE-2016-4805 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-2016-4805, GHSA-jwg9-q35h-9vwx, UBUNTU-CVE-2016-4805.