CVE-2025-55780
published 2025-09-23CVE-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…
high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
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
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| artifex | mupdf | >= 0 < 1.27.0+ds1-2 | 1.27.0+ds1-2 |
| artifex | mupdf | >= 1.24.0 < 1.26.7 | 1.26.7 |
| debian | mupdf | < mupdf 1.27.0+ds1-2 (forky) | mupdf 1.27.0+ds1-2 (forky) |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH