CVE-2018-20191 Null dereference in n/a

What is CVE-2018-20191?

CVE-2018-20191 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 20 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Weakness: CWE-476

Which versions are affected by CVE-2018-20191?

It affects 3 products.

Products include Canonical Ubuntu Linux, Fedoraproject Fedora, Qemu Qemu.

How do I fix CVE-2018-20191?

Apply the vendor's patch.

Is CVE-2018-20191 being exploited?

There is no known exploitation of CVE-2018-20191 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-2018-20191, GHSA-h5wg-wcrq-7mp8.