CVE-2020-6851

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5.2%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation5% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
5.2%
EPSS %ILE
92nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

January 13, 2020

Last Modified

September 22, 2026

Advisory Details (9)

Auto-updated Sep 22, 2026
Patch available. Sources: redhat.
generic

[SECURITY] [DSA 4882-1] openjpeg2 security update

https://www.debian.org/security/2021/dsa-4882
generic

Heap buffer overflow in libopenjp2 · Issue #1228 · uclouvain/openjpeg · GitHub

https://github.com/uclouvain/openjpeg/issues/1228
genericMentions a patch (unverified)

[SECURITY] [DLA 2277-1] openjpeg2 security update

https://lists.debian.org/debian-lts-announce/2020/07/msg00008.html
generic

[SECURITY] Fedora 30 Update: mingw-openjpeg2-2.3.1-5.fc30 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LACIIDDCKZJEPKTTFILSOSBQL7L3FC6V/
generic

[SECURITY] Fedora 31 Update: openjpeg2-2.3.1-4.fc31 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XBRMI2D3XPVWKE3V52KRBW7BJVLS5LD3/
redhatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2020:0296
redhatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2020:0274
redhatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2020:0262
genericMentions a patch (unverified)

[SECURITY] [DLA 2081-1] openjpeg2 security update

https://lists.debian.org/debian-lts-announce/2020/01/msg00025.html

Vendor Advisories for CVE-2020-6851(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibgs9-common (9.26~dfsg+0-0ubuntu0.16.04.14) @ xenial2026-09-22ubuntu
ubuntulibopenjpip7 (2.1.2-1.1+deb9u5build0.16.04.1) @ xenial2026-09-22ubuntu
ubuntulibopenjpip-dec-server (2.1.2-1.1+deb9u6ubuntu0.1~esm3) @ xenial2026-09-22ubuntu
redhatopenjpeg2-0:2.3.0-9.el8_02020-01-30redhat
redhatopenjpeg2-0:2.3.1-2.el8_12020-01-29redhat
redhatopenjpeg2-0:2.3.1-2.el7_72020-01-28redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(24 across 24 ecosystems)
Alpine:v3.10(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.11(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.12(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.1-r3: fixed in 2.3.1-r3
—
Alpine:v3.8(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.0-r4: fixed in 2.3.0-r4
—
Alpine:v3.9(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg—
  • every version up to 2.3.0-r5: fixed in 2.3.0-r5
—
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg22.3.0-2, 2.3.0-2+deb10u1
  • every version up to 2.3.0-2+deb10u2: fixed in 2.3.0-2+deb10u2
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg2—
  • every version up to 2.4.0-1: fixed in 2.4.0-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg2—
  • every version up to 2.4.0-1: fixed in 2.4.0-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg2—
  • every version up to 2.4.0-1: fixed in 2.4.0-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg2—
  • every version up to 2.4.0-1: fixed in 2.4.0-1
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg22.1.0-2 ... 2.1.0-2+deb8u8 (9 versions)
  • every version up to 2.1.0-2+deb8u9: fixed in 2.1.0-2+deb8u9
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
openjpeg22.1.2-1.1, 2.1.2-1.1+deb9u1, 2.1.2-1.1+deb9u2, 2.1.2-1.1+deb9u3, 2.1.2-1.1+deb9u4
  • every version up to 2.1.2-1.1+deb9u5: fixed in 2.1.2-1.1+deb9u5
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(6)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 175 total refreshes for this CVE.

  1. 2026-10-05 17:40 UTCEPSS rescore
  2. 2026-10-04 23:18 UTCEPSS rescore
  3. 2026-10-03 14:22 UTCEPSS rescore
  4. 2026-10-03 14:22 UTCEPSS rescore
  5. 2026-10-02 16:22 UTCEPSS rescore
  6. 2026-10-01 19:46 UTCEPSS rescore
  7. 2026-09-30 15:22 UTCEG score recompute
  8. 2026-09-30 14:59 UTCEPSS rescore
  9. 2026-09-27 13:41 UTCEPSS rescore
  10. 2026-09-26 15:54 UTCEPSS rescore
  11. 2026-09-26 15:54 UTCEPSS rescore
  12. 2026-09-26 00:21 UTCEPSS rescore
  13. 2026-09-24 14:00 UTCEPSS rescore
  14. 2026-09-22 18:35 UTCVendor advisory
  15. 2026-09-22 18:34 UTCGHSA enrichment
  16. 2026-09-22 17:39 UTCEG score recompute
  17. 2026-09-22 17:39 UTCVendor advisory
  18. 2026-09-22 17:39 UTCGHSA enrichment
  19. 2026-09-22 14:44 UTCEPSS rescore
  20. 2026-09-21 20:28 UTCEPSS rescore
  21. 2026-09-19 15:37 UTCEPSS rescore
  22. 2026-09-18 19:23 UTCEPSS rescore
  23. 2026-09-17 19:22 UTCEPSS rescore
  24. 2026-09-16 14:04 UTCEPSS rescore
  25. 2026-09-15 03:06 UTCEPSS rescore
Show 75 more
  1. 2026-09-13 16:43 UTCEPSS rescore
  2. 2026-09-12 14:57 UTCEPSS rescore
  3. 2026-09-08 21:56 UTCEPSS rescore
  4. 2026-09-07 21:18 UTCOSV refresh
  5. 2026-09-07 15:58 UTCEPSS rescore
  6. 2026-09-06 13:44 UTCEPSS rescore
  7. 2026-09-05 15:25 UTCEPSS rescore
  8. 2026-09-04 13:57 UTCEPSS rescore
  9. 2026-09-04 13:57 UTCEPSS rescore
  10. 2026-09-04 05:03 UTCEPSS rescore
  11. 2026-09-02 14:08 UTCEPSS rescore
  12. 2026-09-01 03:32 UTCEPSS rescore
  13. 2026-08-30 19:14 UTCEPSS rescore
  14. 2026-08-30 01:19 UTCEPSS rescore
  15. 2026-08-28 21:37 UTCEPSS rescore
  16. 2026-08-27 14:21 UTCEPSS rescore
  17. 2026-08-26 14:42 UTCEPSS rescore
  18. 2026-08-21 23:45 UTCEPSS rescore
  19. 2026-08-21 06:44 UTCOSV refresh
  20. 2026-08-19 17:00 UTCEPSS rescore
  21. 2026-08-18 13:44 UTCEPSS rescore
  22. 2026-08-17 13:43 UTCEPSS rescore
  23. 2026-08-17 13:43 UTCEPSS rescore
  24. 2026-08-16 14:52 UTCEPSS rescore
  25. 2026-08-16 02:11 UTCEPSS rescore
  26. 2026-08-15 01:27 UTCEPSS rescore
  27. 2026-08-13 21:57 UTCEPSS rescore
  28. 2026-08-12 13:47 UTCEPSS rescore
  29. 2026-08-09 13:43 UTCEPSS rescore
  30. 2026-08-08 16:33 UTCEPSS rescore
  31. 2026-08-07 16:23 UTCEPSS rescore
  32. 2026-08-06 13:43 UTCEPSS rescore
  33. 2026-08-05 21:21 UTCOSV refresh
  34. 2026-08-05 19:14 UTCEPSS rescore
  35. 2026-08-04 15:06 UTCEPSS rescore
  36. 2026-08-04 10:34 UTCEPSS rescore
  37. 2026-08-02 02:24 UTCEPSS rescore
  38. 2026-08-01 04:12 UTCEPSS rescore
  39. 2026-07-30 16:25 UTCEPSS rescore
  40. 2026-07-30 01:27 UTCEPSS rescore
  41. 2026-07-28 15:33 UTCEPSS rescore
  42. 2026-07-26 14:52 UTCEPSS rescore
  43. 2026-07-25 14:15 UTCEPSS rescore
  44. 2026-07-24 14:15 UTCEPSS rescore
  45. 2026-07-23 14:15 UTCEPSS rescore
  46. 2026-07-23 01:54 UTCEG score recompute
  47. 2026-07-22 22:40 UTCEG score recompute
  48. 2026-07-22 14:05 UTCEPSS rescore
  49. 2026-07-21 15:22 UTCEPSS rescore
  50. 2026-07-21 15:22 UTCEPSS rescore
  51. 2026-07-20 17:04 UTCEPSS rescore
  52. 2026-07-20 17:04 UTCEPSS rescore
  53. 2026-07-19 21:48 UTCOSV refresh
  54. 2026-07-19 14:28 UTCEPSS rescore
  55. 2026-07-19 14:28 UTCEPSS rescore
  56. 2026-07-19 02:26 UTCEPSS rescore
  57. 2026-07-19 02:26 UTCEPSS rescore
  58. 2026-07-18 10:02 UTCEPSS rescore
  59. 2026-07-16 17:00 UTCEPSS rescore
  60. 2026-07-15 16:55 UTCEPSS rescore
  61. 2026-07-15 16:55 UTCEPSS rescore
  62. 2026-07-15 01:57 UTCEPSS rescore
  63. 2026-07-13 22:27 UTCEPSS rescore
  64. 2026-07-13 22:27 UTCEPSS rescore
  65. 2026-07-13 06:10 UTCEPSS rescore
  66. 2026-07-13 06:10 UTCEPSS rescore
  67. 2026-07-12 05:44 UTCEPSS rescore
  68. 2026-07-12 05:44 UTCEPSS rescore
  69. 2026-07-11 08:25 UTCEPSS rescore
  70. 2026-07-11 08:25 UTCEPSS rescore
  71. 2026-07-09 19:07 UTCEPSS rescore
  72. 2026-07-08 15:12 UTCEPSS rescore
  73. 2026-07-07 13:43 UTCEPSS rescore
  74. 2026-07-06 16:25 UTCEPSS rescore
  75. 2026-07-06 02:21 UTCEPSS rescore

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2020-6851?
CVE-2020-6851 is a high vulnerability published on January 13, 2020. OpenJPEG through 2.3.1 has a heap-based buffer overflow in opjt1clbldecodeprocessor in openjp2/t1.c because of lack of opjj2kupdateimagedimensions validation.
When was CVE-2020-6851 disclosed?
CVE-2020-6851 was first published on January 13, 2020, with the most recent update on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-6851 actively exploited?
CVE-2020-6851 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.2% probability of exploitation in the next 30 days (92nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-6851?
CVE-2020-6851 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2020-6851?
A fix for CVE-2020-6851 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2020-6851 are linked in the Vendor Advisories panel on this page.

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