SUSE: Grub2 Moderate Update 2025:4224-1 CVE-2025-54771 CVE-2025-61661

## This update for grub2 fixes the following issues: * CVE-2025-54771: Fixed rub_file_close() does not properly controls the fs refcount (bsc#1252931) * CVE-2025-61661: Fixed out-of-bounds write in grub_usb_get_string() function (bsc#1252932) * CVE-2025-61662: Fixed missing unregister call for gettext command may lead to use-after-free (bsc#1252933) * CVE-2025-61663: Fixed missing unregister call for normal commands may lead to use-after-free (bsc#1252934) * CVE-2025-61664: Fixed missing unregister call for normal_exit command may lead to use-after-free (bsc#1252935) Other fixes: * Bump upstream SBAT generation to 6 ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".