CVE-2012-6093: The QSslSocket::sslErrors function in Qt before 4.6.5, 4.7.x before 4.7.6, 4.8.x before 4.8.5, when using cert

Q: How do I fix CVE-2012-6093?

qt: upgrade to newer than 4.6.5; ubuntu linux: mitigate or apply the listed mitigation; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2012-6093 being exploited?

CVE-2012-6093 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-2012-6093 affect?

CVE-2012-6093 affects qt, ubuntu linux, opensuse. Severity is medium (CVSS 4.3). The QSslSocket::sslErrors function in Qt before 4.6.5, 4.7.x before 4.7.6, 4.8.x before 4.8.5, when using certain versions of openSSL, uses an "incompatible structure layout" that can read memory from the wrong location, which causes Qt to

Q: How urgent is CVE-2012-6093?

Priority 40/100. On your watchlist

This month

MEDIUM 4.3WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2012-6093 is a medium-severity flaw (CVSS 4.3) affecting qt, ubuntu linux, opensuse. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The QSslSocket::sslErrors function in Qt before 4.6.5, 4.7.x before 4.7.6, 4.8.x before 4.8.5, when using certain versions of openSSL, uses an "incompatible structure layout" that can read memory from the wrong location, which causes Qt to report an incorrect error when certificate validation fails and might cause users to make unsafe security decisions to accept a certificate.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-310
Published	2013-02-24
Last modified	2026-06-16

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

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

Am I affected?

Timeline

2013-02-24 19:55 UTCPublished CVE record published
2026-06-16 23:47 UTCUpdated Record last modified

qt qt UPGRADE

Affected: <= 4.6.5 · 4.6.0 · 4.6.0 rc1 · 4.6.1 · 4.6.2 · 4.6.3 · 4.6.4 · 4.7.0

Fixed in: newer than 4.6.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 4.6.5 (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.

canonical ubuntu linux MITIGATE

Affected: 10.04 · 11.10 · 12.04 · 12.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.04

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.

opensuse opensuse MITIGATE

Affected: 11.4 · 12.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.4

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-2012-6093?

qt: upgrade to newer than 4.6.5; ubuntu linux: mitigate or apply the listed mitigation; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-6093 being exploited?

CVE-2012-6093 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-2012-6093 affect?

CVE-2012-6093 affects qt, ubuntu linux, opensuse. Severity is medium (CVSS 4.3). The QSslSocket::sslErrors function in Qt before 4.6.5, 4.7.x before 4.7.6, 4.8.x before 4.8.5, when using certain versions of openSSL, uses an "incompatible structure layout" that can read memory from the wrong location, which causes Qt to

How urgent is CVE-2012-6093?

Priority 40/100. On your watchlist

Software pages

OpenSSL vulnerabilities · Ubuntu vulnerabilities

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References

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