CVE-2013-0254: The QSharedMemory class in Qt 5.0.0, 4.8.x before 4.8.5, 4.7.x before 4.7.6, and other versions including 4.4.

Routine

LOW 3.6DOWNGRADE

CVE-2013-0254 is a low-severity flaw (CVSS 3.6) affecting qt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The QSharedMemory class in Qt 5.0.0, 4.8.x before 4.8.5, 4.7.x before 4.7.6, and other versions including 4.4.0 uses weak permissions (world-readable and world-writable) for shared memory segments, which allows local users to read sensitive information or modify critical program data, as demonstrated by reading a pixmap being sent to an X server.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	3.6 (Low)
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-264
Published	2013-02-06
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: qt

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-02-06 12:05 UTCPublished CVE record published
2026-06-16 23:49 UTCUpdated Record last modified

qt qt DOWNGRADE

Affected: 1.41 · 1.42 · 1.43 · 1.44 · 1.45 · 2.0.0 · 2.0.1 · 2.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.41

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.41 (Debian / Ubuntu)

apt-cache madison qt sudo apt install qt=<VERSION_BEFORE_1.41> sudo apt-mark hold qt

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

dnf --showduplicates list qt sudo dnf downgrade qt-<VERSION_BEFORE_1.41> 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.

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-2013-0254?

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

Is CVE-2013-0254 being exploited?

CVE-2013-0254 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-2013-0254 affect?

CVE-2013-0254 affects qt. Severity is low (CVSS 3.6). The QSharedMemory class in Qt 5.0.0, 4.8.x before 4.8.5, 4.7.x before 4.7.6, and other versions including 4.4.0 uses weak permissions (world-readable and world-writable) for shared memory segments, which allows local users to read sensitive

How urgent is CVE-2013-0254?

Priority 22/100. No elevated risk signals yet.

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References

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