| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-21656: hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur |
| |
| 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] |
| |
| The Linux kernel CVE team has assigned CVE-2025-21656 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.6 with commit 5b46903d8bf372e563bf2150d46b87fff197a109 and fixed in 6.6.72 with commit 53e25b10a28edaf8c2a1d3916fd8929501a50dfc |
| Issue introduced in 5.6 with commit 5b46903d8bf372e563bf2150d46b87fff197a109 and fixed in 6.12.10 with commit 42268d885e44af875a6474f7bba519cc6cea6a9d |
| Issue introduced in 5.6 with commit 5b46903d8bf372e563bf2150d46b87fff197a109 and fixed in 6.13 with commit 82163d63ae7a4c36142cd252388737205bb7e4b9 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-21656 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/hwmon/drivetemp.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/53e25b10a28edaf8c2a1d3916fd8929501a50dfc |
| https://git.kernel.org/stable/c/42268d885e44af875a6474f7bba519cc6cea6a9d |
| https://git.kernel.org/stable/c/82163d63ae7a4c36142cd252388737205bb7e4b9 |
