CVE-2018-1092 Null dereference in Linux kernel through version 4.15

What is CVE-2018-1092?

CVE-2018-1092 is a medium-severity vulnerability in Linux kernel, 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_iget function in fs/ext4/inode.c in the Linux kernel through 4.15.15 mishandles the case of a root directory with a zero i_links_count, which allows attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image.

Weakness: CWE-476

Which versions are affected by CVE-2018-1092?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2018-1092?

Apply the vendor's patch.

Is CVE-2018-1092 being exploited?

There is no known exploitation of CVE-2018-1092 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-1092, GHSA-3c5r-q6c5-xr2g, UBUNTU-CVE-2018-1092.