What is CVE-2018-1049?

CVE-2018-1049 is a medium-severity vulnerability in Red Hat, Inc. Systemd, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.9/10. Published 2018-02-16.

How severe is CVE-2018-1049?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2018-1049 known to be exploited?

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

Vulnerability in Red Hat, Inc. Systemd

CVE-2018-1049

In systemd prior to 234 a race condition exists between .mount and .automount units such that automount requests from kernel may not be serviced by systemd resulting in kernel holding the mountpoint and any processes that try to use said mount will hang. A race condition like this may lead to denial of service, until mount points are unmounted.

Vulnerability class: Race Condition

Published 2018-02-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.074 (94.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.072 · newest: 0.074 · change: +0.003

Affected products

Red Hat, Inc. Systemd — versions prior to 234
Systemd Project
Canonical Ubuntu Linux — versions 14.04, 16.04
Debian Linux — versions 8.0
Red Hat Enterprise Linux — versions 7.0
Red Hat Enterprise Linux Aus — versions 7.4, 7.6
Red Hat Enterprise Linux Desktop — versions 7.0
Red Hat Enterprise Linux Server — versions 7.0
Red Hat Enterprise Linux Server Aus — versions 7.4, 7.6
Red Hat Enterprise Linux Server Eus — versions 7.4, 7.5, 7.6

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

Public proof-of-concept exploits

References

www.securitytracker.com/id/1041520 (VDB Entry, Third Party Advisory, vdb-entry)
lists.debian.org/debian-lts-announce/2018/11/msg00017.html (mailing-list, Mailing List, Third Party Advisory)
access.redhat.com/errata/RHSA-2018:0260 (vendor-advisory, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
usn.ubuntu.com/3558-1/ (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2018-1049?: CVE-2018-1049 is a medium-severity vulnerability in Red Hat, Inc. Systemd, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.9/10. Published 2018-02-16.
How severe is CVE-2018-1049?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2018-1049 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.