CVE-2025-0690 Information

Description

The read command is used to read the keyboard input from the user while reads it keeps the input length in a 32-bit integer value which is further used to reallocate the line buffer to accept the next character. During this process with a line big enough it’s possible to make this variable to overflow leading to a out-of-bounds write in the heap based buffer. This flaw may be leveraged to corrupt grub’s internal critical data and secure boot bypass is not discarded as consequence.

CVSS Vector

CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

Reference

https://access.redhat.com/security/cve/CVE-2025-0690 https://bugzilla.redhat.com/show_bug.cgi?id=2346123

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

6.1