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Fencer Vulns
medium 6.5

CVE-2018-20846 json

Out-of-bounds accesses in the functions pi_next_lrcp, pi_next_rlcp, pi_next_rpcl, pi_next_pcrl, pi_next_rpcl, and pi_next_cprl in openmj2/p…

published 2019-06-26 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13386

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

Out-of-bounds accesses in the functions pi_next_lrcp, pi_next_rlcp, pi_next_rpcl, pi_next_pcrl, pi_next_rpcl, and pi_next_cprl in openmj2/pi.c in OpenJPEG through 2.3.0 allow remote attackers to cause a denial of service (application crash).

Patch / fix

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

debian advisories DEBIAN-CVE-2018-20846

  • openjpeg SLES for SAP 15, SLES 15-LTSS, SLES 15 SP2-BCL +9 more 1.5.2-150000.4.10.1
  • openjpeg2 SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES for SAP 15 +21 more 2.3.0-150000.3.8.1
  • 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-2022:4082-1SUSE-SU-2022:3802-1SUSE-SU-2022:1129-1

  • 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-2018-20846 updated cvss 6.5

openjpeg: out-of-bounds read in functions pi_next_lrcp, pi_next_rlcp, pi_next_rpcl, pi_next_pcrl, pi_next_rpcl, and pi_next_cprl in openmj2/pi.c leads to denial of service

  • Red Hat Enterprise Linux 6 openjpeg, openjpeg-libs
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 openjpeg, openjpeg2, openjpeg-libs, openjpeg2-tools Red Hat Enterprise Linux 8 openjpeg2, openjpeg2-tools
    affected: no fix planned “Will not fix”

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

2.17% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/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-20 Improper Input Validation

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.