CVE-2025-61663: 
Echo vulnerability analysis and mitigation

CVE-2025-61663 is a security vulnerability in the GRUB2 bootloader that was disclosed on November 18, 2025. The vulnerability stems from a missing unregister call for normal commands in the normal module, affecting multiple versions of Red Hat Enterprise Linux (RHEL) and Red Hat OpenShift Container Platform (Red Hat Security).

The vulnerability occurs when the normal command is registered in the normal module during load but fails to unregister during module unload. This implementation flaw has been assigned a CVSS v3 score of 4.9 and is categorized under CWE-825. The vulnerability affects multiple Red Hat Enterprise Linux versions (RHEL 7, 8, 9, 10) and Red Hat OpenShift Container Platform 4 (Red Hat Security).

When exploited, this vulnerability can lead to a use-after-free condition when the normal command is invoked after the normal module unload. The severity is rated as moderate, indicating potential stability issues or security risks in affected systems (Bugzilla Report).

Red Hat has acknowledged this vulnerability and assigned it a moderate severity rating with a deadline of November 18, 2025, for remediation. Users of affected systems should monitor for updates and apply them when available (Bugzilla Report).