Out-of-bounds accesses in the functions pi_next_lrcp, pi_next_rlcp, pi_next_rpcl…
Priority LOW 33CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
Out-of-bounds accesses in the functions pi_next_lrcp, pi_next_rlcp, pi_next_rpcl, pi_next_pcrl, pi_next_rpcl, and pi_next_cprl in openmj2/pi.c in OpenJPEG through 2.3.0 allow remote attackers to cause a denial of service (application crash).
Why it matters now
EPSS 0.02168 82nd percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:uclouvain:openjpeg:*:*:*:*:*:*:*:* | up to 2.3.0 | Vulnerable | The OpenJPEG Project |
- cpe:2.3:a:uclouvain:openjpeg:*:*:*:*:*:*:*:* Versions up to 2.3.0 Vulnerable ·The OpenJPEG Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2018-20846
- 2026-10-03 Alias added: GHSA-g752-v9rv-66cg
References
More The OpenJPEG Project Openjpeg vulnerabilities
- TI-2025-34608 OpenJPEG allows OOB heap memory write in opj_jp2_read_header CVSS 4.0MEDIUM 6.6
- TI-2025-32278 openjpeg v 2.5.0 was discovered to contain a NULL pointer dereference via the component /openjp2/dwt.c. CVSS 3.1MEDIUM 6.5
- TI-2012-02889 Multiple heap-based buffer overflows in the j2k_read_sot function in j2k.c in OpenJPEG… CVSS 2.0HIGH 10.0
- TI-2017-12771 In OpenJPEG 2.3.0, a stack-based buffer overflow was discovered in the pgxtovolume… CVSS 3.1CRITICAL 9.8
- TI-2017-12770 In OpenJPEG 2.3.0, a stack-based buffer overflow was discovered in the pgxtoimage… CVSS 3.0CRITICAL 9.8
- TI-2015-07301 Use-after-free vulnerability in the opj_j2k_write_mco function in j2k.c in OpenJPEG… CVSS 3.0CRITICAL 9.8
Sources
- CVE-2018-20846 · CVE Program
- CVE-2018-20846 · NVD
- FIRST EPSS
- GHSA-g752-v9rv-66cg · GitHub Advisory Database · CC BY 4.0
- CVE-2018-20846 · Red Hat security data · CC BY 4.0
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