CVE-2025-61661— Grub2: grub2: out-of-bounds write via malicious usb device
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I. Basic Information for CVE-2025-61661
Vulnerability Information
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Vulnerability Title
Grub2: grub2: out-of-bounds write via malicious usb device
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
缓冲区大小计算不正确
Source: NVD (National Vulnerability Database)
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USB设备字符串转换处理不当，可能导致拒绝服务或数据损坏。
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 |
II. Public POCs for CVE-2025-61661
| # | POC Description | Source Link | Shenlong Link |
|---|
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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-2025-61663 | 4.9 MEDIUM | Grub2: missing unregister call for normal commands 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() |
IV. Related Vulnerabilities
Same product: grub2
- CVE-2025-54770
Grub2: use-after-free in net_set_vlan - CVE-2025-61664
Grub2: missing unregister call for normal_exit command may l - CVE-2025-61663
Grub2: missing unregister call for normal commands may lead - CVE-2025-61662
Grub2: missing unregister call for gettext command may lead - CVE-2025-54771
Grub2: use-after-free in grub_file_close()
Same weakness: CWE-131
V. Comments for CVE-2025-61661
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