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Xpdf CMap Object Loop Vulnerability Leading to Stack Overflow

Vulnerability

A stack overflow vulnerability due to infinite recursion has been identified in Xpdf versions through 4.05. This issue arises from a PDF object loop in a CMap, triggered by the 'UseCMap' entry, causing the application to enter an endless loop and eventually overflow the stack.

Impact

Exploitation of this vulnerability causes a stack overflow, which can lead to arbitrary code execution or a denial-of-service condition by crashing the application.

Remediation

Users can upgrade to Xpdf version 4.06, where this vulnerability will be fixed.

Added: Oct 16, 2025, 10:19 PM
Updated: Oct 16, 2025, 10:19 PM

Vulnerability Rating

Custom Algorithm
spread
2.4
impact
2.5
exploitability
4.4
remediation
7.7
relevance
0.7
threat
0.0
urgency
2.9
incentive
0.8

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.