CVE-2018-19872: An issue was discovered in Qt 5.11

This month

MEDIUM 5.5DOWNGRADEMITIGATEMITIGATE

CVE-2018-19872 is a medium-severity flaw (CVSS 5.5) affecting qt, leap, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Qt 5.11. A malformed PPM image causes a division by zero and a crash in qppmhandler.cpp.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-369
Published	2019-03-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fedoraproject · opensuse · qt

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-03-21 16:00 UTCPublished CVE record published
2026-06-17 01:50 UTCUpdated Record last modified

qt qt DOWNGRADE

Affected: 5.11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.11.0

1. Check installed version

apt-cache policy qt || rpm -q qt || qt --version

2. No fixed release: DOWNGRADE to a release before 5.11.0 (Debian / Ubuntu)

apt-cache madison qt sudo apt install qt=<VERSION_BEFORE_5.11.0> sudo apt-mark hold qt

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list qt sudo dnf downgrade qt-<VERSION_BEFORE_5.11.0> sudo dnf versionlock add qt

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

opensuse leap MITIGATE

Affected: 15.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

fedoraproject fedora MITIGATE

Affected: 28 · 29 · 30

Fixed in: no fixed release known

Safe to downgrade to: a release before 28

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-19872?

qt: downgrade or apply the listed mitigation; leap: mitigate or apply the listed mitigation; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-19872 being exploited?

CVE-2018-19872 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-19872 affect?

CVE-2018-19872 affects qt, leap, fedora. Severity is medium (CVSS 5.5). An issue was discovered in Qt 5.11. A malformed PPM image causes a division by zero and a crash in qppmhandler.cpp.

How urgent is CVE-2018-19872?

Priority 42/100. Public exploit reference

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References

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