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Fencer Vulns
high 7.8

CVE-2021-32493 json

A flaw was found in djvulibre-3.5.28 and earlier.

published 2021-06-24 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19339

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 61%
public exploits
0
none known

Summary

A flaw was found in djvulibre-3.5.28 and earlier. A heap buffer overflow in function DJVU::GBitmap::decode() via crafted djvu file may lead to application crash and other consequences.

Patch / fix

  • djvulibre Debian 14, Debian 13, Debian 12 3.5.28-2

debian advisories DEBIAN-CVE-2021-32493

  • djvulibre Ubuntu 18.04 LTS 3.5.27.1-8ubuntu0.3
  • djvulibre Ubuntu 20.04 LTS 3.5.27.1-14ubuntu0.1
  • djvulibre Ubuntu Pro 16.04 LTS 3.5.27.1-5ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2021-32493

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • djvulibre SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +10 more 3.5.27-3.11.1
  • djvulibre SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +11 more 3.5.25.3-5.9.1
  • djvulibre SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 3.5.21-3.9.1
  • djvulibre SLE Module for Package Hub 15 SP3, SLE Module for Package Hub 15 SP2, SLE Module for Desktop Applications 15 SP3 +1 more 3.5.27-11.3.1

suse advisories SUSE-SU-2021:1649-1SUSE-SU-2021:1645-1SUSE-SU-2021:14728-1SUSE-SU-2021:1641-1

  • djvulibre openSUSE Tumbleweed 3.5.28-3.2
  • djvulibre openSUSE Leap 15.3 3.5.27-11.3.1
  • djvulibre openSUSE Leap 15.2 3.5.27-lp152.7.3.1

opensuse advisories openSUSE-SU-2024:10719-1openSUSE-SU-2021:1641-1openSUSE-SU-2021:0759-1

  • djvulibre Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 3.5.28-r1

alpine advisories ALPINE-CVE-2021-32493

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • djvulibre Arch Linux 3.5.28-3

arch linux advisories AVG-1899

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-2021-32493 updated cvss 7.0

djvulibre: Heap buffer overflow in function DJVU::GBitmap::decode() via crafted djvu file

  • 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

0.96% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • n/a djvulibre

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787 Out-of-bounds Write

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.