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

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.

Timeline

Scores

EPSS (exploitation in 30 days)

1.4% · top 27% of all CVEs (14 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.6.

Affected products

• grub2

  • affected ≤ 2.12

• Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support

  • unaffected 1:2.02-0.87.el7_9.15 – < *

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 1:2.02-162.el8_10 – < *

• Red Hat · Red Hat Enterprise Linux 8.2 Advanced Update Support

  • unaffected 1:2.02-87.el8_2.13 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

  • unaffected 1:2.02-99.el8_4.12 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Telecommunications Update Service

  • unaffected 1:2.02-99.el8_4.12 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions

  • unaffected 1:2.02-99.el8_4.12 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

  • unaffected 1:2.02-123.el8_6.18 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Telecommunications Update Service

  • unaffected 1:2.02-123.el8_6.18 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions

  • unaffected 1:2.02-123.el8_6.18 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Extended Update Support

  • unaffected 1:2.02-152.el8_8.2 – < *

• Red Hat · Red Hat Enterprise Linux 9

  • unaffected 1:2.06-94.el9_5 – < *

• Red Hat · Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

  • unaffected 1:2.06-27.el9_0.22 – < *

• Red Hat · Red Hat Enterprise Linux 9.2 Extended Update Support

  • unaffected 1:2.06-61.el9_2.10 – < *

• Red Hat · Red Hat Enterprise Linux 9.4 Extended Update Support

  • unaffected 1:2.06-86.el9_4.2 – < *

• Red Hat · Red Hat OpenShift Container Platform 4.12

  • unaffected 412.86.202503310142-0 – < *

• Red Hat · Red Hat OpenShift Container Platform 4.13

  • unaffected 413.92.202504070146-0 – < *

• Red Hat · Red Hat OpenShift Container Platform 4.14

  • unaffected 414.92.202505141057-0 – < *

• Red Hat · Red Hat OpenShift Container Platform 4.15

  • unaffected 415.92.202504282058-0 – < *

• Red Hat · Red Hat OpenShift Container Platform 4.16

  • unaffected 416.94.202503252048-0 – < *

• Red Hat · Red Hat OpenShift Container Platform 4.17

  • unaffected 417.94.202503241418-0 – < *

• Red Hat · Red Hat OpenShift Container Platform 4.18

  • unaffected 418.94.202504021150-0 – < *

• Red Hat · Red Hat Enterprise Linux 10

  All versions: unaffected

What to do

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.

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• EUVD EUVD-2025-4653 (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2025-0624](https://cveledger.app/badge/CVE-2025-0624.svg)](https://cveledger.app/cve/CVE-2025-0624)

Record last updated 4 Nov 2026, 21:28 UTC.