CVE-2026-85458

Received Received - Intake

Divide-by-zero in Xpdf Type 3 Font Handling

Publication date: 2026-09-03

Last updated on: 2026-09-03

Assigner: Glyph & Cog, LLC

Description

Divide-by-zero in Xpdf 4.06 (and earlier), when a glyph in a Type 3 font has a zero height.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-03

Last Modified

2026-09-03

Generated

2026-09-04

AI Q&A

2026-09-04

EPSS Evaluated

N/A

NVD

CVE-2026-85458

Affected Vendors & Products

Vendor	Product	Version / Range
xpdf	xpdf	to 4.06 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-369	The product divides a value by zero.

Attack-Flow Graph

Executive Summary

This vulnerability is a divide-by-zero issue in Xpdf 4.06 and earlier versions. It occurs when a glyph in a Type 3 font has a zero height, which can cause the application to crash or behave unexpectedly.

Detection Guidance

This vulnerability is specific to Xpdf versions 4.06 and earlier due to a divide-by-zero issue in Type 3 font glyphs. Detection requires checking the installed Xpdf version. Run: xpdf -v or xpdf --version. If the output shows version 4.06 or earlier, the system is vulnerable.

Impact Analysis

The impact is limited due to the low CVSS score of 2.1. It may cause denial-of-service conditions by crashing the application when processing malformed Type 3 fonts, but does not lead to code execution or data leaks.

Mitigation Strategies

Upgrade Xpdf to the latest version immediately. Check the official Xpdf website or package manager for updates. For example, on Debian/Ubuntu: sudo apt update && sudo apt upgrade xpdf. If upgrading is not possible, consider disabling Type 3 font rendering in Xpdf or switching to an alternative PDF reader.

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