Description
Artifex MuPDF 1.11 allows attackers to execute arbitrary code or cause a denial of service via a crafted .xps file, related to a "User Mode Write AV near NULL starting at wow64!Wow64NotifyDebugger+0x000000000000001d" on Windows. This occurs because read_zip_dir_imp in fitz/unzip.c does not check whether size fields in a ZIP entry are negative numbers.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mupdf | 1.11+ds1-1.1 | — |
| Debian 13 | mupdf | 1.11+ds1-1.1 | — |
| Debian 12 | mupdf | 1.11+ds1-1.1 | — |
| Debian 9 | mupdf | 1.9a+ds1-4+deb9u1 | DSA-4006-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | mupdf | No fix yet | — |
Advisories 1
- DSA-4006-1 mupdf - security update Debian Security (DSA / DLA) · Mar 9, 2026