Answer in brief
CVE-2025-21656 records a Medium severity (CVSS 5.5) vulnerability in hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5b46903d8bf372e563bf2150d46b87fff197a109 <babdf2a11329d30dc5086eb7a938a360aa490282 || >=5b46903d8bf372e563bf2150d46b87fff197a109 <0435d35f9d511fa5ddba49c9f68f947e395c93f9 || >=5b46903d8bf372e563bf2150d46b87fff197a109 <f9723fd2770ef5563ff1685f72bcc1c411219c29 || >=5b46903d8bf372e563bf2150d46b87fff197a109 <53e25b10a28edaf8c2a1d3916fd8929501a50dfc || >=5b46903d8bf372e563bf2150d46b87fff197a109 <42268d885e44af875a6474f7bba519cc6cea6a9d || >=5b46903d8bf372e563bf2150d46b87fff197a109 <82163d63ae7a4c36142cd252388737205bb7e4b9 | babdf2a11329d30dc5086eb7a938a360aa490282, 0435d35f9d511fa5ddba49c9f68f947e395c93f9, f9723fd2770ef5563ff1685f72bcc1c411219c29, 53e25b10a28edaf8c2a1d3916fd8929501a50dfc, 42268d885e44af875a6474f7bba519cc6cea6a9d, 82163d63ae7a4c36142cd252388737205bb7e4b9 |
| Linux/Linuxgeneric | 5.6 | Not reported |
Published upstream
Jan 21, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 30, 2026
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]
Quoted source text, attributed separately from HOL analysis.