VDB
CVE-2025-55780
CVE-2025-55780
PUBLISHED
CVSS 7.5 HIGH
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.
EPSS 0.43% · 35.8th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.43%
35.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| artifex | mupdf | 1.24.0 |
| n/a | n/a | * |
Timeline
- Sep 23, 2025 CVE Published
- Sep 24, 2025 EPSS Score
- Sep 25, 2025 CVE Updated
- Oct 1, 2025 EPSS Score
- Oct 4, 2025 Coalition ESS Score
- Oct 6, 2025 Coalition ESS Score
- Oct 8, 2025 EPSS Score
- Oct 15, 2025 EPSS Score
- Oct 22, 2025 EPSS Score
- Oct 29, 2025 EPSS Score
- Nov 5, 2025 EPSS Score
- Nov 10, 2025 Coalition ESS Score