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Fencer Vulns
medium 5.5

CVE-2021-4216 json

A Floating point exception (division-by-zero) flaw was found in Mupdf for zero width pages in muraster.c.

published 2022-08-26 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-34074

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

Summary

A Floating point exception (division-by-zero) flaw was found in Mupdf for zero width pages in muraster.c. It is fixed in Mupdf-1.20.0-rc1 upstream.

Patch / fix

  • artifex mupdf 1.20.0
  • mupdf Debian 14, Debian 13, Debian 12 1.20.0+ds1-1

debian advisories DEBIAN-CVE-2021-4216

  • mupdf openSUSE Tumbleweed 1.20.3-2.1
  • mupdf Package Hub 15 SP4, openSUSE Leap 15.4 1.20.3-bp154.2.3.1
  • mupdf Package Hub 15 SP3, openSUSE Leap 15.3 1.12.0-bp153.2.6.1

opensuse advisories openSUSE-SU-2024:12326-1openSUSE-SU-2022:10126-1openSUSE-SU-2022:10125-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-4216 updated cvss 5.5

mupdf: division-by-zero for zero width pages in muraster.c

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • n/a mupdf

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.