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CVE-2018-1092

21
FAUCET Score

CVE-2018-1092 is a denial-of-service vulnerability affecting the Linux kernel, specifically the ext4 filesystem, up to version 4.15.15. It arises from improper handling of a zero i_links_count in a root directory within a crafted ext4 image, leading to a NULL pointer dereference. With a CVSS score of 5.5 (Medium), this vulnerability requires local access and user interaction (e.g., mounting a malicious image) to trigger a system crash (OOPS). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.15.15CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.00%
Probability of exploitation in next 30 days
EPSS Percentile
78.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0200 is in the 89th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-957.rt56.910.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt-0:4.14.0-115.el7a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-957.el7
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: realtime-kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2018-1092Low

kernel: NULL pointer dereference in ext4/mballoc.c:ext4_process_freed_data() when mounting crafted ext4 image

Mar 22, 2018

References

openwall.com / lists/oss-security/2018/03/29/1
Mailing ListThird Party Advisory
access.redhat.com / errata/RHSA-2018:2948
access.redhat.com / errata/RHSA-2018:3083
access.redhat.com / errata/RHSA-2018:3096
bugzilla.kernel.org / show_bug.cgi
Issue Tracking
bugzilla.kernel.org / show_bug.cgi
Issue Tracking
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
git.kernel.org / pub/scm/linux/kernel/git/tytso/ext4.git/commit
Patch
lists.debian.org / debian-lts-announce/2018/05/msg00000.html
usn.ubuntu.com / 3676-1
usn.ubuntu.com / 3676-2
usn.ubuntu.com / 3677-1
usn.ubuntu.com / 3677-2
usn.ubuntu.com / 3678-1
usn.ubuntu.com / 3678-2
usn.ubuntu.com / 3678-3
usn.ubuntu.com / 3678-4
usn.ubuntu.com / 3754-1
debian.org / security/2018/dsa-4187
debian.org / security/2018/dsa-4188