CVE-2011-2691

Original summary

Normalized public record · Updated Oct 23, 2026

The png_err function in pngerror.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 makes a function call using a NULL pointer argument instead of an empty-string argument, which allows remote attackers to cause a denial of service (application crash) via a crafted PNG image.

Publisher and source text is retained separately from QFinch interpretation.

Affected products

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

1. Confirm the affected product and reachable code path exist in your environment.
2. Apply the vendor-supported patch or mitigation from the primary advisory.
3. Rescan the exact deployed revision and retain verification evidence.

Evidence coverage

SSVC priority

LOW

Confidence

Not available

Aliases

None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

1. 49660 ↗
2. 48660 ↗
3. bugzilla.redhat.com ↗
4. libpng.git.sourceforge.net ↗
5. 45046 ↗
6. libpng-pngdefaulterror-dos(68537) ↗
7. MDVSA-2011:151 ↗
8. GLSA-201206-15 ↗
9. www.libpng.org ↗
10. FEDORA-2011-9336 ↗
11. DSA-2287 ↗
12. APPLE-SA-2011-10-12-3 ↗

Record history

Published Jul 17, 2011 · Last refreshed Oct 23, 2026