Description

A null pointer dereference occurs in the function break_word_for_overflow_wrap() in MuPDF 1.26.4 when rendering a malformed EPUB document. Specifically, the function calls fz_html_split_flow() to split a FLOW_WORD node, but does not check if node->next is valid before accessing node->next->overflow_wrap, resulting in a crash if the split fails or returns a partial node chain.

INFO

Published Date :

2025-09-23T00:00:00.000Z

Last Modified :

2025-09-25T14:47:03.426Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2025-55780 vulnerability.

Vendors Products
Artifex
  • Mupdf
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-55780.

URL Resource
https://bugs.ghostscript.com/show_bug.cgi?id=708720 cve-icon cve-icon
https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=bdd5d241748807378a78a622388e0312332513c5 cve-icon cve-icon
https://github.com/ISH2YU/CVE-2025-55780/tree/main cve-icon cve-icon
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