What is CVE-2018-12928?

CVE-2018-12928 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2018-06-28.

How severe is CVE-2018-12928?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2018-12928 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Linux Kernel

CVE-2018-12928

In the Linux kernel 4.15.0, a NULL pointer dereference was discovered in hfs_ext_read_extent in hfs.ko. This can occur during a mount of a crafted hfs filesystem.

Published 2018-06-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (34.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Linux Kernel — versions 4.15
Canonical Ubuntu Linux — versions 16.04.4

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

RUB-SysSec/redqueen

References

www.securityfocus.com/bid/104593 (VDB Entry, Third Party Advisory, vdb-entry)
marc.info/ (Mailing List, Third Party Advisory)
bugs.launchpad.net/ubuntu/+source/linux/+bug/1763384 (Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2018-12928?: CVE-2018-12928 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2018-06-28.
How severe is CVE-2018-12928?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2018-12928 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.