CVE-2012-1111: lightdm before 1.0.9 does not properly close file descriptors before opening a child process, which allows loc

Q: How do I fix CVE-2012-1111?

lightdm: upgrade to newer than 1.0.8. Exact commands for each OS are on this page.

Q: Is CVE-2012-1111 being exploited?

CVE-2012-1111 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-2012-1111 affect?

CVE-2012-1111 affects lightdm. Severity is medium (CVSS 4.6). lightdm before 1.0.9 does not properly close file descriptors before opening a child process, which allows local users to write to the lightdm log or have other unspecified impact.

Q: How urgent is CVE-2012-1111?

Priority 31/100. Public exploit reference

Routine

MEDIUM 4.6UPGRADE

CVE-2012-1111 is a medium-severity flaw (CVSS 4.6) affecting lightdm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

lightdm before 1.0.9 does not properly close file descriptors before opening a child process, which allows local users to write to the lightdm log or have other unspecified impact.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.6 (Medium)
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-200
Published	2014-10-27
Last modified	2026-06-16

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

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

Am I affected?

Timeline

2014-10-27 20:55 UTCPublished CVE record published
2026-06-16 23:39 UTCUpdated Record last modified

robert ancell lightdm UPGRADE

Affected: <= 1.0.8 · 0.0.1 · 0.0.2 · 0.0.3 · 0.0.4 · 0.1.0 · 0.1.1 · 0.1.2

Fixed in: newer than 1.0.8

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.0.8 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lightdm

Note

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

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-2012-1111?

lightdm: upgrade to newer than 1.0.8. Exact commands for each OS are on this page.

Is CVE-2012-1111 being exploited?

CVE-2012-1111 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-2012-1111 affect?

CVE-2012-1111 affects lightdm. Severity is medium (CVSS 4.6). lightdm before 1.0.9 does not properly close file descriptors before opening a child process, which allows local users to write to the lightdm log or have other unspecified impact.

How urgent is CVE-2012-1111?

Priority 31/100. Public exploit reference

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References

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