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CVE-2025-61663— Grub2: missing unregister call for normal commands may lead to use-after-free

Quick assessment

Affected
GNU grub2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GNU GRUB是GNU社区的一款Linux系统引导程序。 GNU GRUB存在安全漏洞，该漏洞源于normal命令释放后重用，可能导致拒绝服务或系统崩溃。

CVSS 4.9 · Medium EPSS 0.13% · P2

Affected Version Matrix 7

VendorProduct Version RangeStatus
GNU grub2 ≤ 2.14 affected
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
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I. Basic Information for CVE-2025-61663

Vulnerability Information
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Vulnerability Title
Grub2: missing unregister call for normal commands may lead to use-after-free
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been identified in the GRUB2 bootloader's normal command that poses an immediate Denial of Service (DoS) risk. This flaw is a Use-after-Free issue, caused because the normal command is not properly unregistered when the module is unloaded. An attacker who can execute this command can force the system to access memory locations that are no longer valid. Successful exploitation leads directly to system instability, which can result in a complete crash and halt system availability. Impact on the data integrity and confidentiality is also not discarded.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
无效指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
GNU GRUB 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNU GRUB是GNU社区的一款Linux系统引导程序。 GNU GRUB存在安全漏洞，该漏洞源于normal命令释放后重用，可能导致拒绝服务或系统崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GNU grub2 0 ~ 2.14 -
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2025-61663

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III. Intelligence Information for CVE-2025-61663

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Same Patch Batch · GNU · 2025-11-18 · 6 CVEs total

CVE-2025-61662 7.8 HIGH Grub2: missing unregister call for gettext command may lead to use-after-free
CVE-2025-61664 4.9 MEDIUM Grub2: missing unregister call for normal_exit command may lead to use-after-free
CVE-2025-54770 4.9 MEDIUM Grub2: use-after-free in net_set_vlan
CVE-2025-54771 4.9 MEDIUM Grub2: use-after-free in grub_file_close()
CVE-2025-61661 4.8 MEDIUM Grub2: grub2: out-of-bounds write via malicious usb device

IV. Related Vulnerabilities

Same product: grub2
Same vendor: GNU
Same weakness: CWE-825

V. Comments for CVE-2025-61663

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