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VULNERABILITIES

CVE-2025-55780 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugs.ghostscript.com/show_bug.cgi?id=708720 [email protected]Issue TrackingThird Party Advisory
https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=bdd5d241748807378a78a622388e0312332513c5 [email protected]Permissions Required
https://github.com/ISH2YU/CVE-2025-55780/tree/main [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-476NULL Pointer DereferenceCISA-ADP

Affected Products

ProductVersions
artifex mupdf
>= 1.24.0, < 1.26.7

CPE

  • cpe:2.3:a:artifex:mupdf:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2025-55780
NVD Published Date:
Sep 23, 2025
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2025-55780 Details - Not Deferred