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Fencer Vulns
high 8.8

CVE-2018-15518 json

QXmlStream in Qt 5.x before 5.11.3 has a double-free or corruption during parsing of a specially crafted illegal XML document.

published 2018-12-26 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-7395

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

QXmlStream in Qt 5.x before 5.11.3 has a double-free or corruption during parsing of a specially crafted illegal XML document.

Patch / fix

  • qt qt 5.11.3
  • qtbase-opensource-src Debian 14, Debian 13, Debian 12 5.11.3+dfsg-2

debian advisories DEBIAN-CVE-2018-15518

  • qtbase-opensource-src Ubuntu 16.04 LTS 5.5.1+dfsg-16ubuntu7.6
  • qtbase-opensource-src Ubuntu 18.04 LTS 5.9.5+dfsg-0ubuntu2.1

ubuntu advisories UBUNTU-CVE-2018-15518

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • qt RHEL 7 1:4.8.7-8.el7
  • qt-x11 RHEL 7 1:4.8.7-8.el7
  • qt-odbc RHEL 7 1:4.8.7-8.el7
  • qt-qvfb RHEL 7 1:4.8.7-8.el7
  • qt-demos RHEL 7 1:4.8.7-8.el7
  • qt-mysql RHEL 7 1:4.8.7-8.el7
  • qt-config RHEL 7 1:4.8.7-8.el7
  • qt-examples RHEL 7 1:4.8.7-8.el7

red hat advisories RHSA-2020:1172RHSA-2019:3390RHSA-2019:2135

  • libqt4 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +5 more 4.8.7-8.13.1
  • libqt4-sql-plugins SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +5 more 4.8.7-8.13.1
  • libqt5-qtbase SLE Module for Desktop Applications 15, SLE Module for Basesystem 15 5.9.4-8.11.13
  • libqt5-qtbase SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 5.6.1-17.6.2
  • libqt5-qtbase SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4 +5 more 5.6.2-6.15.2
  • libqt5-qtbase SLES for SAP 12 SP1, SLES 12 SP1-LTSS 5.5.1-8.3.1
  • libqt5-qtbase SLES 12-LTSS 5.3.1-4.7.2

suse advisories SUSE-SU-2020:1021-1SUSE-SU-2018:4210-2SUSE-SU-2019:0447-1SUSE-SU-2018:4294-1SUSE-SU-2018:4210-1SUSE-SU-2018:4183-1

  • libqt4 Package Hub 15 SP2 4.8.7-bp152.4.3.1
  • libqt4-sql-plugins Package Hub 15 SP2 4.8.7-bp152.4.3.1
  • libqt4 openSUSE Leap 15.2 4.8.7-lp152.10.3.1
  • libqt4-sql-plugins openSUSE Leap 15.2 4.8.7-lp152.10.3.1
  • libqt4 Package Hub 15 SP1 4.8.7-bp151.4.3.1
  • libqt4-sql-plugins Package Hub 15 SP1 4.8.7-bp151.4.3.1
  • libqt4 openSUSE Leap 15.1 4.8.7-lp151.9.3.1
  • libqt4-sql-plugins openSUSE Leap 15.1 4.8.7-lp151.9.3.1

opensuse advisories openSUSE-SU-2020:1530-1openSUSE-SU-2020:1501-1openSUSE-SU-2020:1500-1openSUSE-SU-2020:1452-1openSUSE-SU-2019:0265-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-15518 updated cvss 5.3

qt5-qtbase: Double free in QXmlStreamReader

  • Red Hat CodeReady Linux Builder (v. 8) qt5-qtbase-static 5.11.1-7.el8, qt5-qttools-static 5.11.1-9.el8, qt5-qtbase-debuginfo 5.11.1-7.el8, qt5-qttools-debuginfo 5.11.1-9.el8, qt5-designer-debuginfo 5.11.1-9.el8, qt5-doctools-debuginfo 5.11.1-9.el8, +18 more Red Hat Enterprise Linux AppStream (v. 8) qt5-qtbase 5.11.1-7.el8, qt5-qttools 5.11.1-9.el8, qt5-designer 5.11.1-9.el8, qt5-doctools 5.11.1-9.el8, qt5-linguist 5.11.1-9.el8, qt5-assistant 5.11.1-9.el8, +12 more
    fixed: vendor fix RHSA-2019:3390
  • Red Hat Enterprise Linux Client (v. 7) qt 4.8.7-8.el7, qt-x11 4.8.7-8.el7, qt-mysql 4.8.7-8.el7, qt5-qtbase 5.9.7-2.el7, qt5-qtbase-gui 5.9.7-2.el7, qt5-qtbase-common 5.9.7-2.el7 Red Hat Enterprise Linux Client Optional (v. 7) qt-odbc 4.8.7-8.el7, qt-qvfb 4.8.7-8.el7, qt-demos 4.8.7-8.el7, qt-config 4.8.7-8.el7, qt-examples 4.8.7-8.el7, qt5-qttools 5.9.7-1.el7, +23 more
    fixed: vendor fix RHSA-2019:2135
  • Red Hat Enterprise Linux ComputeNode (v. 7) qt 4.8.7-8.el7, qt-x11 4.8.7-8.el7
    fixed: vendor fix RHSA-2020:1172
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) qt-odbc 4.8.7-8.el7, qt-qvfb 4.8.7-8.el7, qt-demos 4.8.7-8.el7, qt-mysql 4.8.7-8.el7, qt-config 4.8.7-8.el7, qt5-qtbase 5.9.7-2.el7, +27 more Red Hat Enterprise Linux Server (v. 7) qt 4.8.7-8.el7, qt-x11 4.8.7-8.el7, qt-odbc 4.8.7-8.el7, qt-mysql 4.8.7-8.el7, qt5-qt3d 5.9.7-1.el7, qt5-qtdoc 5.9.7-1.el7, +36 more Red Hat Enterprise Linux Server Optional (v. 7) qt-qvfb 4.8.7-8.el7, qt-demos 4.8.7-8.el7, qt-config 4.8.7-8.el7, qt-examples 4.8.7-8.el7, qt-assistant 4.8.7-8.el7, qt5-assistant 5.9.7-1.el7, +22 more Red Hat Enterprise Linux Workstation (v. 7) qt 4.8.7-8.el7, qt-x11 4.8.7-8.el7, qt-odbc 4.8.7-8.el7, qt-mysql 4.8.7-8.el7, qt5-qt3d 5.9.7-1.el7, qt5-qtdoc 5.9.7-1.el7, +36 more Red Hat Enterprise Linux Workstation Optional (v. 7) qt-qvfb 4.8.7-8.el7, qt-demos 4.8.7-8.el7, qt-config 4.8.7-8.el7, qt-examples 4.8.7-8.el7, qt-assistant 4.8.7-8.el7, qt5-assistant 5.9.7-1.el7, +22 more
    fixed: vendor fix RHSA-2019:2135

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.50% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.