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Unscored USN-4966-1 1 CVE

libx11 vulnerability

Published May 25, 2021 · Updated Apr 22, 2026

Summary

It was discovered that libx11 incorrectly validated certain parameter
lengths. A remote attacker could possibly use this issue to trick libx11
into emitting extra X protocol requests.

Fixed packages 2

ReleasePackageFixed in
Ubuntu · 18.04 LTS 18.04:LTS libx11 2:1.6.4-3ubuntu0.4
Ubuntu · 20.04 LTS 20.04:LTS libx11 2:1.6.9-2ubuntu1.2

Vulnerabilities 1

References

  • report
    https://ubuntu.com/security/CVE-2021-31535