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Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2025-55780

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 14.0%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2025-55780
  • Artifex » Mupdf » Version: 1.24.0
    cpe:2.3:a:artifex:mupdf:1.24.0
  • Artifex » Mupdf » Version: 1.24.1
    cpe:2.3:a:artifex:mupdf:1.24.1
  • Artifex » Mupdf » Version: 1.24.10
    cpe:2.3:a:artifex:mupdf:1.24.10
  • Artifex » Mupdf » Version: 1.24.11
    cpe:2.3:a:artifex:mupdf:1.24.11
  • Artifex » Mupdf » Version: 1.24.2
    cpe:2.3:a:artifex:mupdf:1.24.2
  • Artifex » Mupdf » Version: 1.24.3
    cpe:2.3:a:artifex:mupdf:1.24.3
  • Artifex » Mupdf » Version: 1.24.4
    cpe:2.3:a:artifex:mupdf:1.24.4
  • Artifex » Mupdf » Version: 1.24.5
    cpe:2.3:a:artifex:mupdf:1.24.5
  • Artifex » Mupdf » Version: 1.24.6
    cpe:2.3:a:artifex:mupdf:1.24.6
  • Artifex » Mupdf » Version: 1.24.7
    cpe:2.3:a:artifex:mupdf:1.24.7
  • Artifex » Mupdf » Version: 1.24.8
    cpe:2.3:a:artifex:mupdf:1.24.8
  • Artifex » Mupdf » Version: 1.24.9
    cpe:2.3:a:artifex:mupdf:1.24.9
  • Artifex » Mupdf » Version: 1.25.0
    cpe:2.3:a:artifex:mupdf:1.25.0
  • Artifex » Mupdf » Version: 1.25.1
    cpe:2.3:a:artifex:mupdf:1.25.1
  • Artifex » Mupdf » Version: 1.25.2
    cpe:2.3:a:artifex:mupdf:1.25.2
  • Artifex » Mupdf » Version: 1.25.3
    cpe:2.3:a:artifex:mupdf:1.25.3
  • Artifex » Mupdf » Version: 1.25.4
    cpe:2.3:a:artifex:mupdf:1.25.4
  • Artifex » Mupdf » Version: 1.25.5
    cpe:2.3:a:artifex:mupdf:1.25.5
  • Artifex » Mupdf » Version: 1.25.6
    cpe:2.3:a:artifex:mupdf:1.25.6
  • Artifex » Mupdf » Version: 1.26.0
    cpe:2.3:a:artifex:mupdf:1.26.0
  • Artifex » Mupdf » Version: 1.26.1
    cpe:2.3:a:artifex:mupdf:1.26.1
  • Artifex » Mupdf » Version: 1.26.2
    cpe:2.3:a:artifex:mupdf:1.26.2
  • Artifex » Mupdf » Version: 1.26.3
    cpe:2.3:a:artifex:mupdf:1.26.3
  • Artifex » Mupdf » Version: 1.26.4
    cpe:2.3:a:artifex:mupdf:1.26.4
  • Artifex » Mupdf » Version: 1.26.5
    cpe:2.3:a:artifex:mupdf:1.26.5
  • Artifex » Mupdf » Version: 1.26.6
    cpe:2.3:a:artifex:mupdf:1.26.6


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