CVE-2018-19871: An issue was discovered in Qt before 5.11.3

Q: How do I fix CVE-2018-19871?

qt: upgrade to 5.11.3; leap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2018-19871 being exploited?

CVE-2018-19871 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-19871 affect?

CVE-2018-19871 affects qt, leap. Severity is medium (CVSS 6.5). An issue was discovered in Qt before 5.11.3. There is QTgaFile Uncontrolled Resource Consumption.

Q: How urgent is CVE-2018-19871?

Priority 43/100. No elevated risk signals yet.

This month

MEDIUM 6.5UPGRADEMITIGATE

CVE-2018-19871 is a medium-severity flaw (CVSS 6.5) affecting qt, leap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Qt before 5.11.3. There is QTgaFile Uncontrolled Resource Consumption.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-400
Published	2018-12-26
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2018-12-26 21:29 UTCPublished CVE record published
2026-06-17 01:50 UTCUpdated Record last modified

qt qt UPGRADE

Affected: < 5.11.3

Fixed in: 5.11.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 5.11.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade qt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade qt

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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.

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-2018-19871?

qt: upgrade to 5.11.3; leap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-19871 being exploited?

CVE-2018-19871 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-2018-19871 affect?

CVE-2018-19871 affects qt, leap. Severity is medium (CVSS 6.5). An issue was discovered in Qt before 5.11.3. There is QTgaFile Uncontrolled Resource Consumption.

How urgent is CVE-2018-19871?

Priority 43/100. No elevated risk signals yet.

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References

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