CVE-2018-1094 Null dereference in Linux kernel through version 4.15

What is CVE-2018-1094?

CVE-2018-1094 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 2 Apr 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

The ext4_fill_super function in fs/ext4/super.c in the Linux kernel through 4.15.15 does not always initialize the crc32c checksum driver, which allows attackers to cause a denial of service (ext4_xattr_inode_hash NULL pointer dereference and system crash) via a crafted ext4 image.

Weakness: CWE-476

Which versions are affected by CVE-2018-1094?

It affects 5 products.

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

How do I fix CVE-2018-1094?

Apply the vendor's patch.

Is CVE-2018-1094 being exploited?

There is no known exploitation of CVE-2018-1094 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-2018-1094, GHSA-qqjj-7xjv-r736, UBUNTU-CVE-2018-1094.