opj_t1_clbl_decode_processor in openjp2/t1.c in OpenJPEG 2.3.1 through 2020-01-28 has a heap-based buffer overflow in the qmfbid==1 case, a different issue than CVE-2020-6851.
https://access.redhat.com/errata/RHSA-2020:0550
https://access.redhat.com/errata/RHSA-2020:0569
https://access.redhat.com/errata/RHSA-2020:0570
https://access.redhat.com/errata/RHSA-2020:0694
https://github.com/uclouvain/openjpeg/issues/1231
https://lists.debian.org/debian-lts-announce/2020/01/msg00035.html
https://lists.debian.org/debian-lts-announce/2020/07/msg00008.html
Source: MITRE
Published: 2020-01-28
Updated: 2021-04-02
Type: CWE-787
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 8.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH