CVEvulnerability
CVE-2025-55780
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2025-09-23
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-476
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.
Affected configurations
• artifex mupdf (>= 1.24.0 < 1.26.7)
Related
Weakness · CWE (1)
- CWE-476 NULL Pointer Dereference weakness
References
- https://bugs.ghostscript.com/show_bug.cgi?id=708720 Issue Tracking, Third Party Advisory
- https://cgit.ghostscript.com/cgi-bin/cgit.cgi/mupdf.git/commit/?id=bdd5d241748807378a78a622388e0312332513c5 Permissions Required
- https://github.com/ISH2YU/CVE-2025-55780/tree/main Third Party Advisory