CVE-2016-5271

Name: CVE-2016-5271
Creator: NVD / NIST
Published: 2016-09-22T22:59:04.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.42%

Last modified Jun 17, 2026

CVE-2016-5271 is a vulnerability of currently unknown severity. The PropertyProvider::GetSpacingInternal function in Mozilla Firefox before 49.0 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via text runs in conjunction with a "display: contents" Cascading Style Sheets (CSS) property.. EPSS estimates a 1.42% chance of exploitation in the next 30 days.

Description

The PropertyProvider::GetSpacingInternal function in Mozilla Firefox before 49.0 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via text runs in conjunction with a "display: contents" Cascading Style Sheets (CSS) property.

Metrics

EPSS Probability

1.42%

69.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	<= 48.0.2

References

Timeline

Published: Sep 22, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-5271?

How severe is CVE-2016-5271?

Severity scoring for CVE-2016-5271 is pending analysis. The EPSS model estimates a 1.42% probability of exploitation in the next 30 days.

How do I fix CVE-2016-5271?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-5271?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST