CVE-2020-25647

A flaw was found in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

• CWE-787
• CWE-787

• https://bugzilla.redhat.com/show_bug.cgi?id=1886936Issue Tracking, Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
• https://security.gentoo.org/glsa/202104-05Third Party Advisory
• https://security.netapp.com/advisory/ntap-20220325-0001/Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1886936Issue Tracking, Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
• https://security.gentoo.org/glsa/202104-05Third Party Advisory
• https://security.netapp.com/advisory/ntap-20220325-0001/Third Party Advisory

Published

Mar 3, 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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