What is CVE-2018-20847?

CVE-2018-20847 is a high-severity vulnerability in Uclouvain Openjpeg, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2019-06-26.

How severe is CVE-2018-20847?

High severity. CVSS v3 base score is 8.8 out of 10.

Integer overflow in Uclouvain Openjpeg

CVE-2018-20847

An improper computation of p_tx0, p_tx1, p_ty0 and p_ty1 in the function opj_get_encoding_parameters in openjp2/pi.c in OpenJPEG through 2.3.0 can lead to an integer overflow.

Vulnerability class: Integer Overflow

Published 2019-06-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (83.6th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.023 · change: +0.002

Affected products

Uclouvain Openjpeg
Debian Linux — versions 8.0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

github.com/uclouvain/openjpeg/pull/1168/commits/c58df149900df862806d0e892859b41… (Patch)
github.com/uclouvain/openjpeg/commit/5d00b719f4b93b1445e6fb4c766b9a9883c57949 (Patch)
github.com/uclouvain/openjpeg/issues/431 (Patch, Third Party Advisory, Issue Tracking)
www.securityfocus.com/bid/108921 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
lists.debian.org/debian-lts-announce/2019/07/msg00010.html (mailing-list, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2018-20847?: CVE-2018-20847 is a high-severity vulnerability in Uclouvain Openjpeg, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2019-06-26.
How severe is CVE-2018-20847?: High severity. CVSS v3 base score is 8.8 out of 10.