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CVE-2025-0689— Grub2: udf: heap based buffer overflow in grub_udf_read_block() may lead to arbitrary code execution

Quick assessment

Affected
CVE-2025-0689
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udf模块包含一个grub_udf_read_block中的基于堆的缓冲区溢出问题，导致任意代码执行。

CVSS 7.8 · High EPSS 0.47% · P39

Affected Version Matrix 6

VendorProduct Version RangeStatus
None None ≤ 2.12 affected
Red Hat Red Hat Enterprise Linux 10 any unaffected
Red Hat Red Hat Enterprise Linux 7 any unaffected
Red Hat Red Hat Enterprise Linux 8 any unaffected
Red Hat Red Hat Enterprise Linux 9 any unaffected
Red Hat Red Hat OpenShift Container Platform 4 any unaffected

I. Basic Information for CVE-2025-0689

Vulnerability Information
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Vulnerability Title
Grub2: udf: heap based buffer overflow in grub_udf_read_block() may lead to arbitrary code execution
Source: CVE Program / CVE List V5
Vulnerability Description
When reading data from disk, the grub's UDF filesystem module utilizes the user controlled data length metadata to allocate its internal buffers. In certain scenarios, while iterating through disk sectors, it assumes the read size from the disk is always smaller than the allocated buffer size which is not guaranteed. A crafted filesystem image may lead to a heap-based buffer overflow resulting in critical data to be corrupted, resulting in the risk of arbitrary code execution by-passing secure boot protections.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
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udf模块包含一个grub_udf_read_block中的基于堆的缓冲区溢出问题，导致任意代码执行。
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
- - 0 ~ 2.12 -
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-2025-0689

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III. Intelligence Information for CVE-2025-0689

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Vendor Advisories for CVE-2025-0689 (2)

Mailing List Discussions for CVE-2025-0689 (1)

IV. Related Vulnerabilities

Same weakness: CWE-120

V. Comments for CVE-2025-0689

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