CVE-2018-1094

Name: CVE-2018-1094
Creator: NVD / NIST
Published: 2018-04-02T03:29:00.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 2.13%

Last modified Jun 17, 2026

CVE-2018-1094 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 2.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

2.13%

79.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	<= 4.15.15
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Workstation	7.0

References

http://openwall.com/lists/oss-security/2018/03/29/1Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3083Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3096Third Party Advisory
https://bugzilla.kernel.org/show_bug.cgi?id=199183Exploit, Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1560788Issue Tracking, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=18db4b4e6fc31eda838dd1c1296d67dbcb3dc957Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=a45403b51582a87872927a3e0fc0a389c26867f1Patch
https://usn.ubuntu.com/3695-1/Third Party Advisory
https://usn.ubuntu.com/3695-2/Third Party Advisory
http://openwall.com/lists/oss-security/2018/03/29/1Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3083Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3096Third Party Advisory
https://bugzilla.kernel.org/show_bug.cgi?id=199183Exploit, Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1560788Issue Tracking, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=18db4b4e6fc31eda838dd1c1296d67dbcb3dc957Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=a45403b51582a87872927a3e0fc0a389c26867f1Patch
https://usn.ubuntu.com/3695-1/Third Party Advisory
https://usn.ubuntu.com/3695-2/Third Party Advisory

Timeline

Published: Apr 2, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1094?

How severe is CVE-2018-1094?

CVE-2018-1094 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 2.13% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1094?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1094?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST