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Fencer Vulns
medium 6.5

CVE-2018-5727 json

In OpenJPEG 2.3.0, there is an integer overflow vulnerability in the opj_t1_encode_cblks function (openjp2/t1.c).

published 2018-01-16 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-17496

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

In OpenJPEG 2.3.0, there is an integer overflow vulnerability in the opj_t1_encode_cblks function (openjp2/t1.c). Remote attackers could leverage this vulnerability to cause a denial of service via a crafted bmp file.

Patch / fix

  • openjpeg2 Debian 14, Debian 13, Debian 12 2.3.1-1

debian advisories DEBIAN-CVE-2018-5727

  • ghostscript Ubuntu 16.04 LTS 9.26~dfsg+0-0ubuntu0.16.04.14
  • ghostscript Ubuntu 18.04 LTS 9.26~dfsg+0-0ubuntu0.18.04.14
  • openjpeg2 Ubuntu Pro 16.04 LTS 2.1.2-1.1+deb9u6ubuntu0.1~esm1
  • openjpeg2 Ubuntu Pro 18.04 LTS 2.3.0-2ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2018-5727

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

  • openjpeg2 SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +20 more 2.3.0-150000.3.5.1

suse advisories SUSE-SU-2022:1252-1

  • 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

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-2018-5727 updated cvss 4.3

openjpeg: integer overflow in opj_t1_encode_cblks in src/lib/openjp2/t1.c

  • 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 6 openjpeg, openjpeg-libs Red Hat Enterprise Linux 7 openjpeg, openjpeg-libs Red Hat Enterprise Linux 8 openjpeg
    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

1.69% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/uclouvain/openjpeg/issues/1053 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/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

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.