CVE-2025-0677 is a heap overflow vulnerability in grub2's UFS module. It occurs when grub2 attempts to read a symlink with an oversized data size, leading to an undersized buffer allocation and subsequent out-of-bounds write. This flaw can be exploited by an attacker crafting a malicious filesystem, potentially leading to arbitrary code execution and bypassing secure boot mechanisms. The vulnerability is rated Medium severity (CVSS 6.4) with high impact on confidentiality, integrity, and availability, but requires high privileges and high attack complexity. There is no evidence of active exploitation, public exploit code, or KEV listing, though it has garnered some community discussion and media coverage, including an article mentioning Microsoft's AI-driven discovery of flaws in GRUB2.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Red Hat | Red Hat OpenShift Container Platform 4 | All Versions ImpactedCNA affecteddefault affected | |
| Red Hat | Red Hat Enterprise Linux 10 | Range not provided by sourceCNA affecteddefault affected | |
| Red Hat | Red Hat Enterprise Linux 7 | Range not provided by sourceCNA affecteddefault unknown | |
| Red Hat | Red Hat Enterprise Linux 8 | Range not provided by sourceCNA affecteddefault unknown | |
| Red Hat | Red Hat Enterprise Linux 9 | Range not provided by sourceCNA affecteddefault affected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.