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I. Basic Information for CVE-2025-21656
Vulnerability Information

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Vulnerability Title
hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur scsi_execute_cmd() function can return both negative (linux codes) and positive (scsi_cmnd result field) error codes. Currently the driver just passes error codes of scsi_execute_cmd() to hwmon core, which is incorrect because hwmon only checks for negative error codes. This leads to hwmon reporting uninitialized data to userspace in case of SCSI errors (for example if the disk drive was disconnected). This patch checks scsi_execute_cmd() output and returns -EIO if it's error code is positive. [groeck: Avoid inline variable declaration for portability]
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞,该漏洞源于hwmon模块中drivetemp驱动在SCSI错误时返回错误的错误码。这可能导致用户空间接收到未初始化的数据。
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
VendorProductAffected VersionsCPESubscribe
LinuxLinux 5b46903d8bf372e563bf2150d46b87fff197a109 ~ 53e25b10a28edaf8c2a1d3916fd8929501a50dfc -
LinuxLinux 5.6 -
II. Public POCs for CVE-2025-21656
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III. Intelligence Information for CVE-2025-21656
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IV. Related Vulnerabilities
V. Comments for CVE-2025-21656

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