Proof of concept for poppler CVE-2025-52885

[kevinbackhouse]

poc to accompany this advisory: https://securitylab.github.com/advisories/GHSL-2025-042_poppler/

[Copilot]

Pull Request Overview

This PR adds a proof of concept demonstration for CVE-2025-52885, a use-after-free vulnerability in the poppler PDF library. The vulnerability is triggered when using specific command-line options with poppler tools.

• Adds documentation explaining the CVE-2025-52885 vulnerability in poppler
• Provides reproduction steps using pdfinfo -struct bug.pdf
• Includes reference links to the bug report, fix, and security advisory

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