CVE-2025-6990: 
WordPress vulnerability analysis and mitigation

CVE-2025-0690 is a vulnerability in the read command functionality of GRUB2 (Grand Unified Boot Loader version 2). The vulnerability was discovered and disclosed on February 24, 2025, affecting various versions of GRUB2 packages in Red Hat Enterprise Linux 9 systems. The issue stems from an integer overflow vulnerability in the read command's input length handling (NVD CVE).

The vulnerability occurs when the read command processes keyboard input from users. The command stores the input length in a 32-bit integer value, which is used to reallocate the line buffer for accepting the next character. With sufficiently large input, this integer value can overflow, leading to a heap-based out-of-bounds write in the buffer. The vulnerability has been assigned a CVSS v3.1 base score of 6.1 (Medium) with the vector string CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H (Red Hat Advisory).

The vulnerability could allow an attacker to corrupt GRUB's internal critical data through heap-based buffer overflow. This could potentially lead to arbitrary code execution and bypass of secure boot mechanisms. The impact is particularly concerning as it affects the boot loader, a critical component of system security (NVD CVE).

Red Hat has released security updates to address this vulnerability in GRUB2 packages. The fix is available through RHSA-2025:6990 for Red Hat Enterprise Linux 9 systems. Users are strongly advised to update their GRUB2 packages to version 2.06-104.el9_6 or later (Red Hat Advisory).