# CVE-2025-0624: Grub2: net: out-of-bounds write in grub_net_search_config_file()

Status: published. Published: 2025-02-19. Updated: 2026-11-04.

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.

## Remediation

- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. (source: CNA: redhat)

## Affected products and versions

-  /  (grub2): ≥ 0; ≤ 2.12 (affected, semver). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 Extended Lifecycle Support (grub2): ≥ 1:2.02-0.87.el7_9.15; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (grub2): ≥ 1:2.02-162.el8_10; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support (grub2): ≥ 1:2.02-87.el8_2.13; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support (grub2): ≥ 1:2.02-99.el8_4.12; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Telecommunications Update Service (grub2): ≥ 1:2.02-99.el8_4.12; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions (grub2): ≥ 1:2.02-99.el8_4.12; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support (grub2): ≥ 1:2.02-123.el8_6.18; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Telecommunications Update Service (grub2): ≥ 1:2.02-123.el8_6.18; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions (grub2): ≥ 1:2.02-123.el8_6.18; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support (grub2): ≥ 1:2.02-152.el8_8.2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (grub2): ≥ 1:2.06-94.el9_5; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions (grub2): ≥ 1:2.06-27.el9_0.22; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support (grub2): ≥ 1:2.06-61.el9_2.10; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.4 Extended Update Support (grub2): ≥ 1:2.06-86.el9_4.2; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4.12 (openshift/ose-rhel-coreos-8): ≥ 412.86.202503310142-0; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4.13 (openshift/ose-rhel-coreos-9): ≥ 413.92.202504070146-0; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4.14 (openshift/ose-rhel-coreos-9): ≥ 414.92.202505141057-0; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4.15 (openshift/ose-rhel-coreos-9): ≥ 415.92.202504282058-0; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4.16 (openshift/ose-rhel-coreos-9): ≥ 416.94.202503252048-0; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4.17 (openshift/ose-rhel-coreos-9): ≥ 417.94.202503241418-0; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4.18 (openshift/ose-rhel-coreos-9): ≥ 418.94.202504021150-0; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (grub2): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.6 (high); CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H; source: CNA: redhat

- CVSS 3.1: 7.6 (high); CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H; source: NVD: secalert@redhat.com

- CISA KEV: No listing in collected sources

- EPSS: 1.41% as of 2026-11-04; percentile 72.66%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-787

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2025:2521 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:2653 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:2655 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:2675 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:2784 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:2799 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:2867 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:2869 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:3297 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:3301 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:3367 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:3396 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:3573 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:3577 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:3780 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:4422 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2025:7702 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2025-0624 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2346112 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://security.netapp.com/advisory/ntap-20250516-0006/ (ADP: CVE)

- https://access.redhat.com/errata/RHSA-2025:2521 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:2653 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:2655 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:2675 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:2784 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:2799 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:2867 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:2869 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:3297 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:3301 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:3367 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:3396 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:3573 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:3577 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:3780 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:4422 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2025:7702 (secalert@redhat.com)

- https://access.redhat.com/security/cve/CVE-2025-0624 (secalert@redhat.com)

- https://bugzilla.redhat.com/show_bug.cgi?id=2346112 (secalert@redhat.com)

- https://security.netapp.com/advisory/ntap-20250516-0006/ (af854a3a-2127-422b-91ae-364da2661108)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2025-0624; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-0624; retrieved 2026-11-05; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-0624; retrieved 2026-11-04; source updated Not reported

Revision: 7a805ca7f9d987b5f00f15d5aa48d350737eb47fa677fb7d7676d929a2dabc47

Canonical: https://y2.dev/cve/CVE-2025-0624

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