CVE-2016-1521

Original summary

Normalized public record · Updated Oct 23, 2026

The directrun function in directmachine.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 and Firefox ESR 38.x before 38.6.1, does not validate a certain skip operation, which allows remote attackers to execute arbitrary code, obtain sensitive information, or cause a denial of service (out-of-bounds read and application crash) via a crafted Graphite smart font.

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

MEDIUM

Confidence

10%

Aliases

None reported

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

Sources and record history

1. openSUSE-SU-2016:0875 ↗
2. GLSA-201701-35 ↗
3. 82991 ↗
4. USN-2902-1 ↗
5. www.oracle.com ↗
6. RHSA-2016:0594 ↗
7. www.oracle.com ↗
8. openSUSE-SU-2016:0791 ↗
9. DSA-3479 ↗
10. blog.talosintel.com ↗
11. RHSA-2016:0258 ↗
12. h20566.www2.hpe.com ↗

Record history

Published Feb 13, 2016 · Last refreshed Oct 23, 2026