CVE-2020-14356 Null dereference in Kernel

What is CVE-2020-14356?

CVE-2020-14356 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 19 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.

Weakness: CWE-476

Which versions are affected by CVE-2020-14356?

It affects 10 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Netapp Hci Management Node and 4 more.

How do I fix CVE-2020-14356?

Apply the vendor's patch.

Is CVE-2020-14356 being exploited?

There is no known exploitation of CVE-2020-14356 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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-2020-14356, GHSA-gm74-x573-mg64, ROOT-OS-UBUNTU-2204-CVE-2020-14356, ROOT-OS-UBUNTU-2404-CVE-2020-14356, UBUNTU-CVE-2020-14356, USN-4484-1.