CVE catalog
CVE-2025-55780
mupdf: CVE-2025-55780
- Severity
- Medium · CVSS 4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.43% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | mupdf | sid | 1.28.2+ds1-2 | fixed |
| Debian | mupdf | forky | 1.28.2+ds1-2 | fixed |
| Debian | mupdf | trixie | 1.25.1+ds1-6+deb13u1 | vulnerable |
| Debian | mupdf | trixie-security | 1.25.1+ds1-6+deb13u1 | vulnerable |
| Debian | mupdf | bookworm | 1.21.1+ds2-1+deb12u1 | vulnerable |
| Debian | mupdf | bookworm-security | 1.21.1+ds2-1+deb12u1 | vulnerable |
| Opensuse | mupdf | leap 16.0 | 1.27.2-bp160.1.1 | fixed |
| Opensuse | mupdf | tumbleweed | 1.27.1-1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | mupdf | source | sid | 1.27.0+ds1-2 | not yet assigned | Not reported | [1116254] |
| Debian | mupdf | source | forky | 1.27.0+ds1-2 | not yet assigned | Not reported | [1116254] |
| Debian | mupdf | source | trixie | (unfixed) | not yet assigned | Not reported | [1116254] |
| Debian | mupdf | source | bookworm | (unfixed) | not yet assigned | Not reported | [1116254] |
| Opensuse | mupdf | rpm | leap 16.0 | 1.27.2-bp160.1.1 | Not reported | OPENSUSE-SU-2026:21180-1 | Not reported |
| Opensuse | mupdf | rpm | tumbleweed | 1.27.1-1.1 | Not reported | OPENSUSE-SU-2026:10214-1 | Not reported |
Notes
[trixie] mupdf: Minor issue [bookworm] mupdf: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libmupdf-dev]Affected
Source package: [mupdf]
Details (4)
1.21.1+ds2-1+deb12u1· amd64 · bookwormAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
1.21.1+ds2-1+deb12u1· arm64 · bookwormAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
1.21.1+ds2-1+deb12u1· amd64 · bookworm-securityAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
1.21.1+ds2-1+deb12u1· arm64 · bookworm-securityAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
- [mupdf]Affected
Details (4)
1.21.1+ds2-1+deb12u1· amd64 · bookwormAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
1.21.1+ds2-1+deb12u1· arm64 · bookwormAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
1.21.1+ds2-1+deb12u1· amd64 · bookworm-securityAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
1.21.1+ds2-1+deb12u1· arm64 · bookworm-securityAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
- [mupdf-tools]Affected
Source package: [mupdf]
Details (4)
1.21.1+ds2-1+deb12u1· amd64 · bookwormAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
1.21.1+ds2-1+deb12u1· arm64 · bookwormAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
1.21.1+ds2-1+deb12u1· amd64 · bookworm-securityAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
1.21.1+ds2-1+deb12u1· arm64 · bookworm-securityAffected
dsa · mupdf · debian · bookworm; dsa · mupdf · debian · 12
[Debian 13 (Trixie)]
- [libmupdf25.1]Affected
Source package: [mupdf]
Details (4)
1.25.1+ds1-6+deb13u1· amd64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· amd64 · trixie-securityAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixie-securityAffected
dsa · mupdf · debian · 13
- [libmupdf-dev]Affected
Source package: [mupdf]
Details (4)
1.25.1+ds1-6+deb13u1· amd64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· amd64 · trixie-securityAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixie-securityAffected
dsa · mupdf · debian · 13
- [mupdf]Affected
Details (4)
1.25.1+ds1-6+deb13u1· amd64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· amd64 · trixie-securityAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixie-securityAffected
dsa · mupdf · debian · 13
- [mupdf-tools]Affected
Source package: [mupdf]
Details (4)
1.25.1+ds1-6+deb13u1· amd64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· amd64 · trixie-securityAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixie-securityAffected
dsa · mupdf · debian · 13
- [python3-mupdf]Affected
Source package: [mupdf]
Details (4)
1.25.1+ds1-6+deb13u1· amd64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixieAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· amd64 · trixie-securityAffected
dsa · mupdf · debian · 13
1.25.1+ds1-6+deb13u1· arm64 · trixie-securityAffected
dsa · mupdf · debian · 13
[openSUSE Tumbleweed]
- [libmupdf28_3]Unknown
Source package: [mupdf]
Details (1)
1.28.3-1.1· x86_64 · tumbleweedUnknown · Fixed:
1.27.1-1.1Version impact unknown
dsa · mupdf · opensuse · tumbleweed
- [mupdf-devel]Unknown
Source package: [mupdf]
Details (1)
1.28.3-1.1· x86_64 · tumbleweedUnknown · Fixed:
1.27.1-1.1Version impact unknown
dsa · mupdf · opensuse · tumbleweed
- [mupdf]Fixed
Source package: [mupdf]
Details (1)
1.28.3-1.1· x86_64 · tumbleweedFixed · Fixed:
1.27.1-1.1dsa · mupdf · opensuse · tumbleweed
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10214-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-55780]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:10214-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21180-1]
- [https://security-tracker.debian.org/tracker/CVE-2025-55780]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-55780.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]