CVE-2020-6851
CVSS v3
7.5
HIGH
EPSS Score
5.3 %
exploit probability, as of 2026-10-20
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
openjpeg: Heap-based buffer overflow in opj_t1_clbl_decode_processor()
Red Hat Security Advisory: openjpeg2 security update
Red Hat Security Advisory: openjpeg2 security update
Red Hat Security Advisory: openjpeg2 security update
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.
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2020-01-13
- Last Modified
- 2026-09-22
Frequently asked questions
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