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Fencer Vulns
medium 5.5

CVE-2021-29338 json

Integer Overflow in OpenJPEG v2.4.0 allows remote attackers to crash the application, causing a Denial of Service (DoS).

published 2021-04-14 5 y ago modified 2026-07-18 3 mo ago also EUVD-2021-15974 , JLSEC-2026-545

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

Integer Overflow in OpenJPEG v2.4.0 allows remote attackers to crash the application, causing a Denial of Service (DoS). This occurs when the attacker uses the command line option "-ImgDir" on a directory that contains 1048576 files.

Patch / fix

  • julia OpenJpeg_jll 2.5.0+0
  • openjpeg2 Debian 14, Debian 13, Debian 12 2.4.0-4

debian advisories DEBIAN-CVE-2021-29338

  • openjpeg2 Ubuntu 20.04 LTS 2.3.1-1ubuntu4.20.04.3
  • openjpeg2 Ubuntu 22.04 LTS 2.4.0-6ubuntu0.2
  • openjpeg2 Ubuntu Pro 16.04 LTS 2.1.2-1.1+deb9u6ubuntu0.1~esm6
  • openjpeg2 Ubuntu Pro 18.04 LTS 2.3.0-2+deb10u2ubuntu0.1~esm3

ubuntu advisories UBUNTU-CVE-2021-29338

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

  • openjpeg2 RHEL 8 2.4.0-4.el8
  • openjpeg2-tools RHEL 8 2.4.0-4.el8

red hat advisories RHSA-2021:4251

  • openjpeg SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +19 more 1.5.2-150000.4.5.1
  • openjpeg2 SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +20 more 2.3.0-150000.3.5.1
  • openjpeg2 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +10 more 2.1.0-4.15.1

suse advisories SUSE-SU-2022:1296-1SUSE-SU-2022:1252-1SUSE-SU-2022:1129-1

  • openjpeg2 AlmaLinux 8 2.4.0-4.el8
  • openjpeg2-tools AlmaLinux 8 2.4.0-4.el8

almalinux advisories ALSA-2021:4251

  • openjpeg2 Rocky Linux 8 2.4.0-4.el8

rocky linux advisories RLSA-2021:4251

  • openjpeg Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 2.4.0-r1

alpine advisories ALPINE-CVE-2021-29338

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

  • openjpeg2 Arch Linux 2.5.0-1

arch linux advisories AVG-1390

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-2021-29338 updated cvss 6.2

openjpeg: out-of-bounds write due to an integer overflow in opj_compress.c

  • Red Hat Enterprise Linux 6 openjpeg, openjpeg-libs Red Hat Enterprise Linux 7 openjpeg, openjpeg2, openjpeg-libs, openjpeg2-tools
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 openjpeg2, openjpeg2-tools
    affected: no fix available “Fix deferred”
  • Red Hat CodeReady Linux Builder (v. 8) openjpeg2-tools 2.4.0-4.el8 Red Hat Enterprise Linux AppStream (v. 8) openjpeg2 2.4.0-4.el8, openjpeg2-tools 2.4.0-4.el8
    fixed: vendor fix RHSA-2021:4251
  • Red Hat Enterprise Linux 9 openjpeg2, openjpeg2-tools
    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

1.56% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/uclouvain/openjpeg/issues/1338 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P
OSV 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia OpenJpeg_jll
>=2.4.0+0, <2.5.0+0
2.5.0+0

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

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.