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.
Conclusion & alert: CVE-2025-0624 is rated Moderate Risk (55.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.66%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-22 | 0.83% | 0.66% | -0.17% |
| 2 | 2026-03-29 | 1.49% | 0.83% | -0.66% |
| 3 | 2026-03-02 | — | 1.49% | — |
Full EPSS history (27 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.6 | 3.1 | HIGH |
|
1.0 | 6.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2025-0624 not yet assigned priority: Debian including 1 source packages (grub2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. | https://security-tracker.debian.org/tracker/CVE-2025-0624 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-0624 |
suse
|
high | CVE-2025-0624 severity important: SUSE including 412 source package names (2.0.4-5.8.146:grub2-2.06-150500.29.43.2, 2.0.4-5.8.146:grub2-i386-pc-2.06-150500.29.43.2, …), 1443 product×package rows across 294 product lines (Container suse/manager/5.0/x86_64/server, Container suse/sl-micro/6.0/base-os-container, … (294 product lines)): Fixed 1222, Known Affected 221. | https://www.suse.com/security/cve/CVE-2025-0624/ |
ubuntu
|
medium | CVE-2025-0624 medium priority: Ubuntu including 3 source packages (grub2, grub2-signed, grub2-unsigned), 29 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 15, not-affected 8, ignored 6. | https://ubuntu.com/security/CVE-2025-0624 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||