CVE-2021-20239

A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.

• CWE-822
• CWE-119

• https://bugzilla.redhat.com/show_bug.cgi?id=1923636Issue Tracking, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1923636Issue Tracking, Third Party Advisory

Published

May 28, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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