Description
In Artifex MuPDF 1.13.0, the fz_append_byte function in fitz/buffer.c allows remote attackers to cause a denial of service (segmentation fault) via a crafted pdf file. This is caused by a pdf/pdf-device.c pdf_dev_alpha array-index underflow.
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 | 1.14.0+ds1-4 | — |
| Debian 13 | mupdf | 1.14.0+ds1-4 | — |
| Debian 12 | mupdf | 1.14.0+ds1-4 | — |
| Debian 9 | mupdf | 1.9a+ds1-4+deb9u5 | DLA-2289-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | mupdf | 1.16.1+ds1-1ubuntu1+esm1 | USN-7825-1 |
| Ubuntu Pro 18.04 LTS | mupdf | 1.12.0+ds1-1ubuntu0.1~esm1 | USN-7825-1 |
| Ubuntu Pro 16.04 LTS | mupdf | 1.7a-1ubuntu0.1~esm1 | USN-7825-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mupdf | 1.18.0-1.7 | openSUSE-SU-2024:11068-1 |
Advisories 3
- USN-7825-1 mupdf vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DLA-2289-1 mupdf - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:11068-1 mupdf-1.18.0-1.7 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026