What’s Vulnerable › Vulnerabilities

CVE-2020-27221

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-21 · updated 2026-06-17
• Weakness: CWE-121

Description

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.

Affected products

• The Eclipse Foundation Eclipse OpenJ9: through 0.23.0

References

• https://bugs.eclipse.org/bugs/show_bug.cgi?id=569763
• https://bugs.eclipse.org/bugs/show_bug.cgi?id=569763

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