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Vulnerabilities

Vulnerability · CVE-2020-21913

International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgd…

Published Sep 20, 2021 · catalog updated Oct 14, 2026 · international components for unicode

Check if you run it

No confirmed exploitation is on record for CVE-2020-21913. EPSS is 1.21%. Act only if a listed version of international components for unicode is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.21%
Remediation
Advisory link
Affected products
cpe debian/debian linux · cpe unicode/international components for unicode

International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgdata/pkgdata.cpp.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe debian/debian linux10.0
  • cpe debian/debian linux9.0
  • cpe unicode/international components for unicodeversion unspecified

How to fix CVE-2020-21913

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2020-21913. EPSS is 1.21%. Act only if a listed version of international components for unicode is installed.

Which versions are affected?

Compare what you have installed with debian/debian linux 10.0; debian/debian linux 9.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-416: Use After Free. EPSS 1.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 20, 2021 · NIST NVD

    Detected

    International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgdata/pkgdata.cpp.

  2. Oct 14, 2026 · NIST NVD

    Updated

    International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgdata/pkgdata.cpp.

Sources

  • CVE.orgVulnerability recordCVE-2020-21913

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-21913

    30-day exploitation probability 1.2%

    first.org
  • NIST NVDVulnerability recordCVE-2020-21913

    International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgdata/pkgdata.cpp.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.