CVE-2018-8781 Integer overflow in Linux Kernel

What is CVE-2018-8781?

CVE-2018-8781 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 23 Apr 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c at the Linux kernel version 3.4 and up to and including 4.15 has an integer-overflow vulnerability allowing local users with access to the udldrmfb driver to obtain full read and write permissions on kernel physical pages, resulting in a code execution in kernel space.

Weakness: CWE-190

Which versions are affected by CVE-2018-8781?

It affects 6 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

How do I fix CVE-2018-8781?

Apply the vendor's patch.

Is CVE-2018-8781 being exploited?

There is no known exploitation of CVE-2018-8781 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-2018-8781, GHSA-c9m9-x3p2-fwvw, UBUNTU-CVE-2018-8781.