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CVE-2018-12928

19
FAUCET Score

CVE-2018-12928 is a NULL pointer dereference vulnerability in the hfs.ko module of the Linux kernel, specifically affecting versions 4.15.0 and various Canonical Ubuntu Linux distributions. This flaw can be triggered by mounting a specially crafted HFS filesystem. With a CVSS score of 5.5 (Medium), this vulnerability has a local attack vector requiring low privileges and no user interaction, leading to high availability impact (denial of service). There is no evidence of active exploitation, nor are there any public exploit modules or proof-of-concept code available in Metasploit, Nuclei, or ExploitDB. The vulnerability has also received minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.15CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:4.15:*:*:*:*:*:*:*
16.04.4CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04.4:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
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
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 88th percentile among its peer group of 15,940 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

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2018-12928Low

kernel: NULL pointer dereference in hfs_ext_read_extent in hfs.ko

Apr 12, 2018

References

bugs.launchpad.net / ubuntu/+source/linux/+bug/1763384
Issue TrackingThird Party Advisory
marc.info
Mailing ListThird Party Advisory
securityfocus.com / bid/104593
Third Party AdvisoryVDB Entry