What is CVE-2018-19489?

CVE-2018-19489 is a medium-severity vulnerability in Qemu, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.7/10. Published 2018-12-13.

How severe is CVE-2018-19489?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Qemu

CVE-2018-19489

v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS users to cause a denial of service (crash) because of a race condition during file renaming.

Vulnerability class: Race Condition

Published 2018-12-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (32.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.0% 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

Qemu — versions 3.1.0
Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
Debian Linux — versions 8.0, 9.0
Fedoraproject Fedora — versions 29
openSUSE Leap — versions 42.3

Weakness classification (CWE)

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

References

www.openwall.com/lists/oss-security/2018/11/26/1 (mailing-list, Patch, Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2019/01/msg00023.html (mailing-list, Mailing List, Third Party Advisory)
lists.gnu.org/archive/html/qemu-devel/2018-11/msg04489.html (Vendor Advisory, mailing-list, Patch, Mailing List)
security-tracker.debian.org/tracker/CVE-2018-19489 (Third Party Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/153326 (VDB Entry, Third Party Advisory, vdb-entry)
git.qemu.org/
www.securityfocus.com/bid/106007 (VDB Entry, Third Party Advisory, vdb-entry)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
usn.ubuntu.com/3923-1/ (vendor-advisory, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html (vendor-advisory, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-19489?: CVE-2018-19489 is a medium-severity vulnerability in Qemu, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.7/10. Published 2018-12-13.
How severe is CVE-2018-19489?: Medium severity. CVSS v3 base score is 4.7 out of 10.