CVE-2020-6851: debian debian_linux Out-of-bounds Write
Vulnerability summary
CVE-2020-6851 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 5.29% chance of exploitation in the next 30 days, higher than 92.5% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (GitHub, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 6Timeline
- 13-01-2020PublishedVulnerability first disclosed.
- 22-09-2026Last modifiedVulnerability information updated.
Description
OpenJPEG through 2.3.1 has a heap-based buffer overflow in opj_t1_clbl_decode_processor in openjp2/t1.c because of lack of opj_j2k_update_image_dimensions validation.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · Red hatEcosystem advisory · calculated8.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
5.29%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
Increase +0.10 pp
From 5.18% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundOpenjpeg
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat14 products
- enterprise_linux8.0
- enterprise_linux_desktop7.0
- enterprise_linux_eus7.7 | 8.1 | 8.2 | 8.4
- enterprise_linux_server7.0
- enterprise_linux_server_aus7.7 | 8.2 | 8.4
Ubuntu6 products
- blenderAll versions (No fix recorded)
- ghostscript< 9.26~dfsg+0-0ubuntu0.16.04.14 | < 9.26~dfsg+0-0ubuntu0.18.04.14
- insighttoolkit4All versions (No fix recorded)
- openjpeg2< 2.1.2-1.1+deb9u5build0.16.04.1 | < 2.3.0-2+deb10u2build0.18.04.1 | < 2.3.1-1ubuntu4
- qtwebengine-opensource-srcAll versions (No fix recorded)
Debian2 products
- openjpeg2< 2.1.0-2+deb8u9 | < 2.4.0-1
- debian_linuxEOL8.0 | 9.0 | 10.0
Oracle2 products
- georaster18c
- outside_in_technology8.5.4 | 8.5.5
Suse2 products
- libheif&distro=SUSE Linux Enterprise Module for Desktop Applications 15 SP7< 1.23.5-150700.3.24.1
- libheif&distro=SUSE Linux Enterprise Module for Package Hub 15 SP7< 1.23.5-150700.3.24.1
Alpine1 product
- openjpeg< 2.3.1-r3 | < 2.3.0-r4 | < 2.3.0-r5
Fedoraproject1 product
- fedoraEOL30 | 31
Mageia1 product
- openjpeg2< 2.3.1-1.2.mga7
Opensuse1 product
- libheif&distro=openSUSE Tumbleweed< 1.23.5-1.1
Uclouvain1 product
- openjpeg≤ 2.3.1
10 vendors · 31 products
References
36 links
lists.debian.org/debian-lts-announce/2020/01/msg00025.htmlMailing ListX Refsource MLISTThird Party Advisory- access.redhat.com/errata/RHSA-2020:0262Vendor AdvisoryX Refsource REDHATWEBAdvisoryThird Party Advisory
- access.redhat.com/errata/RHSA-2020:0274Vendor AdvisoryX Refsource REDHATAdvisoryThird Party Advisory
- access.redhat.com/errata/RHSA-2020:0296Vendor AdvisoryX Refsource REDHATAdvisoryThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/07/msg00008.htmlMailing ListX Refsource MLISTThird Party Advisory
