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]
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.6, < 6.6.72 |
References
- https://git.kernel.org/stable/c/42268d885e44af875a6474f7bba519cc6cea6a9dPatch
- https://git.kernel.org/stable/c/53e25b10a28edaf8c2a1d3916fd8929501a50dfcPatch
- https://git.kernel.org/stable/c/82163d63ae7a4c36142cd252388737205bb7e4b9Patch
FAQ
What is CVE-2025-21656?
CVE-2025-21656 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 (...
How severe is CVE-2025-21656?
CVE-2025-21656 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21656?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.