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TI-2020-16547 Aliases CVE-2020-27221GHSA-768g-gf3v-34vm

Stack-based buffer overflow in Eclipse OpenJ9

Priority MEDIUM 45CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-121 and the CVSS impact.

Summary

In Eclipse OpenJ9 up to and including version 0.23, there is potential for a stack-based buffer overflow when the virtual machine or JNI natives are converting from UTF-8 characters to platform encoding.

Why it matters now

EPSS 0.01551 75th percentileScored 2026-11-07
Fix Fixed Red Hat: 3 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Eclipse FoundationEclipse OpenJ9up to 0.23—No fix listedCNA
  • Eclipse OpenJ9 VendorEclipse Foundation Affected up to 0.23 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:eclipse:openj9:*:*:*:*:*:*:*:*up to 0.23.0VulnerableEclipse Foundation
  • cpe:2.3:a:eclipse:openj9:*:*:*:*:*:*:*:* Versions up to 0.23.0 Vulnerable ·Eclipse Foundation

Remediation

Red Hat 3 advisories

  • RHSA-2021:0736 Released 2021-03-04 · Red Hat rating Critical
    java-1.8.0-ibm security update
    • Red Hat Enterprise Linux 8 Supplementary java-1.8.0-ibm-1:1.8.0.6.25-2.el8_3, java-1.8.0-ibm-demo-1:1.8.0.6.25-2.el8_3, java-1.8.0-ibm-devel-1:1.8.0.6.25-2.el8_3 +5
  • RHSA-2021:0717 Released 2021-03-04 · Red Hat rating Critical
    java-1.8.0-ibm security update
    • Red Hat Enterprise Linux Client Supplementary (v. 7) java-1.8.0-ibm-1:1.8.0.6.25-1jpp.1.el7, java-1.8.0-ibm-demo-1:1.8.0.6.25-1jpp.1.el7, java-1.8.0-ibm-devel-1:1.8.0.6.25-1jpp.1.el7 +3
    • Red Hat Enterprise Linux ComputeNode Supplementary (v. 7) java-1.8.0-ibm-1:1.8.0.6.25-1jpp.1.el7, java-1.8.0-ibm-demo-1:1.8.0.6.25-1jpp.1.el7, java-1.8.0-ibm-devel-1:1.8.0.6.25-1jpp.1.el7 +1
    • Red Hat Enterprise Linux Server Supplementary (v. 7) java-1.8.0-ibm-1:1.8.0.6.25-1jpp.1.el7, java-1.8.0-ibm-demo-1:1.8.0.6.25-1jpp.1.el7, java-1.8.0-ibm-devel-1:1.8.0.6.25-1jpp.1.el7 +3
    • Red Hat Enterprise Linux Workstation Supplementary (v. 7) java-1.8.0-ibm-1:1.8.0.6.25-1jpp.1.el7, java-1.8.0-ibm-demo-1:1.8.0.6.25-1jpp.1.el7, java-1.8.0-ibm-devel-1:1.8.0.6.25-1jpp.1.el7 +3
  • RHSA-2021:0733 Released 2021-03-04 · Red Hat rating Critical
    java-1.7.1-ibm security update
    • Red Hat Enterprise Linux Client Supplementary (v. 7) java-1.7.1-ibm-1:1.7.1.4.80-1jpp.1.el7, java-1.7.1-ibm-demo-1:1.7.1.4.80-1jpp.1.el7, java-1.7.1-ibm-devel-1:1.7.1.4.80-1jpp.1.el7 +3
    • Red Hat Enterprise Linux ComputeNode Supplementary (v. 7) java-1.7.1-ibm-1:1.7.1.4.80-1jpp.1.el7, java-1.7.1-ibm-demo-1:1.7.1.4.80-1jpp.1.el7, java-1.7.1-ibm-devel-1:1.7.1.4.80-1jpp.1.el7 +1
    • Red Hat Enterprise Linux Server Supplementary (v. 7) java-1.7.1-ibm-1:1.7.1.4.80-1jpp.1.el7, java-1.7.1-ibm-demo-1:1.7.1.4.80-1jpp.1.el7, java-1.7.1-ibm-devel-1:1.7.1.4.80-1jpp.1.el7 +3
    • Red Hat Enterprise Linux Workstation Supplementary (v. 7) java-1.7.1-ibm-1:1.7.1.4.80-1jpp.1.el7, java-1.7.1-ibm-demo-1:1.7.1.4.80-1jpp.1.el7, java-1.7.1-ibm-devel-1:1.7.1.4.80-1jpp.1.el7 +3

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 8 SupplementaryFixed RHSA-2021:0736
Red Hat Enterprise Linux Client Supplementary (v. 7)Fixed RHSA-2021:0717, RHSA-2021:0733
Red Hat Enterprise Linux ComputeNode Supplementary (v. 7)Fixed RHSA-2021:0717, RHSA-2021:0733
Red Hat Enterprise Linux Server Supplementary (v. 7)Fixed RHSA-2021:0717, RHSA-2021:0733
Red Hat Enterprise Linux Workstation Supplementary (v. 7)Fixed RHSA-2021:0717, RHSA-2021:0733

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27221
  2. 2026-10-03 Alias added: GHSA-768g-gf3v-34vm

References

Advisory 1

  • TI-2026-06062 Out-of-bounds read in Eclipse OpenJ9 CVSS 4.0HIGH 8.7
  • TI-2021-09396 Missing initialization of resource in Eclipse OpenJ9 CVSS 3.1MEDIUM 6.5
  • TI-2018-09008 Improper input validation in Eclipse OpenJ9 CVSS 3.0CRITICAL 9.8
  • TI-2018-09006 Improper input validation in Eclipse OpenJ9 CVSS 3.0CRITICAL 9.8
  • TI-2021-17899 In Eclipse Openj9 before version 0.29.0, the JVM does not throw IllegalAccessError for… CVSS 3.1CRITICAL 9.8
  • TI-2019-08829 Out-of-bounds write in Eclipse OpenJ9 CVSS 3.0CRITICAL 9.8
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences