VulnerabilityDeferred

CVE-2025-0624

During this step, it fails to consider the environment variable length when allocating the internal buffer, resulting in an out-of-bounds write.

HIGH 7.6EPSS 1.41%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A flaw was found in grub2. During the network boot process, when trying to search for the configuration file, grub copies data from a user controlled environment variable into an internal buffer using the grub_strcpy() function. During this step, it fails to consider the environment variable length when allocating the internal buffer, resulting in an out-of-bounds write. If correctly exploited, this issue may result in remote code execution through the same network segment grub is searching for the boot information, which can be used to by-pass secure boot protections.

CVSS 3.1: 7.6 HIGHCVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS: 1.41% probability · 71th percentile
CISA KEV: Not listed
Weakness: CWE-787
Source: secalert@redhat.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.