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CVE-2018-1095

17
FAUCET Score

CVE-2018-1095 is a denial-of-service vulnerability affecting the Linux kernel (through version 4.15.15) in the ext4 filesystem. It stems from improper validation of extended attribute (xattr) sizes, leading to a NULL pointer dereference and system crash. This vulnerability has a CVSS score of 5.5 (Medium) and can be triggered locally with low attack complexity, requiring user interaction (e.g., mounting a crafted ext4 image). 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
1.46%
Probability of exploitation in next 30 days
EPSS Percentile
70.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0146 is in the 81st percentile among its peer group of 5,760 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 (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt-0:4.14.0-115.el7a
View patch

Vendor Advisories (1)

redhatCVE-2018-1095Low

kernel: out-of-bound access in fs/posix_acl.c:get_acl() causes crash with crafted ext4 image

Mar 22, 2018

References

openwall.com / lists/oss-security/2018/03/29/1
Mailing List
access.redhat.com / errata/RHSA-2018:2948
bugzilla.kernel.org / show_bug.cgi
ExploitIssue Tracking
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
git.kernel.org / pub/scm/linux/kernel/git/tytso/ext4.git/commit
Patch
usn.ubuntu.com / 3695-1
usn.ubuntu.com / 3695-2