High
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-6851
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 15:43 UTC · Revision 1
Source evidence
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.
osv:CVE-2020-6851
Complete source record
{
"id": "a6688c1ecafb0fa091849b75f91d6a5dd71731e04cfef07dd60d537c01688998",
"url": "https://osv.dev/vulnerability/CVE-2020-6851",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-6851",
"summary": "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.",
"evidence": "osv:CVE-2020-6851",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2020-6851",
"aliases": [
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"metrics": [
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
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"modified": "2026-10-21T17:42:36.816247046Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LACIIDDCKZJEPKTTFILSOSBQL7L3FC6V/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XBRMI2D3XPVWKE3V52KRBW7BJVLS5LD3/",
"https://access.redhat.com/errata/RHSA-2020:0262",
"https://access.redhat.com/errata/RHSA-2020:0274",
"https://access.redhat.com/errata/RHSA-2020:0296",
"https://lists.debian.org/debian-lts-announce/2020/01/msg00025.html",
"https://lists.debian.org/debian-lts-announce/2020/07/msg00008.html",
"https://www.debian.org/security/2021/dsa-4882",
"https://www.oracle.com/security-alerts/cpujul2020.html",
"https://github.com/uclouvain/openjpeg/issues/1228"
],
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{
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{
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},
"related_cves": [
{
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"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 398175,
"published_at": "2020-01-13T06:15:10.957+00:00"
}