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CVE-2025-21656— hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur

Quick assessment

Affected
Linux Linux
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.

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。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 5b46903d8bf372e563bf2150d46b87fff197a109< 53e25b10a28edaf8c2a1d3916fd8929501a50dfc affected
5b46903d8bf372e563bf2150d46b87fff197a109< 42268d885e44af875a6474f7bba519cc6cea6a9d affected
5b46903d8bf372e563bf2150d46b87fff197a109< 82163d63ae7a4c36142cd252388737205bb7e4b9 affected
5.6 affected
< 5.6 unaffected
6.6.72≤ 6.6.* unaffected
6.12.10≤ 6.12.* unaffected
6.13≤ * unaffected
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 5b46903d8bf372e563bf2150d46b87fff197a109 ~ 53e25b10a28edaf8c2a1d3916fd8929501a50dfc -
Linux Linux 5.6 -

II. Public POCs for CVE-2025-21656

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III. Intelligence Information for CVE-2025-21656

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Patches & Fixes for CVE-2025-21656 (3)

Same Patch Batch · Linux · 2025-01-21 · 25 CVEs total

CVE-2025-21663 10.0 CRITICAL net: stmmac: dwmac-tegra: Read iommu stream id from device tree
CVE-2024-57932 9.8 CRITICAL gve: guard XDP xmit NDO on existence of xdp queues
CVE-2024-57936 9.8 CRITICAL RDMA/bnxt_re: Fix max SGEs for the Work Request
CVE-2025-21659 8.1 HIGH netdev: prevent accessing NAPI instances from another namespace
CVE-2025-21664 7.8 HIGH dm thin: make get_first_thin use rcu-safe list first function
CVE-2025-21661 7.8 HIGH gpio: virtuser: fix missing lookup table cleanups
CVE-2024-57945 7.8 HIGH riscv: mm: Fix the out of bound issue of vmemmap address
CVE-2024-57943 exfat: fix the new buffer was not zeroed before writing
CVE-2024-57946 virtio-blk: don't keep queue frozen during system suspend
CVE-2025-21662 net/mlx5: Fix variable not being completed when function returns
CVE-2025-21660 ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked
CVE-2025-21658 btrfs: avoid NULL pointer dereference if no valid extent tree
CVE-2025-21657 sched_ext: Replace rq_lock() to raw_spin_rq_lock() in scx_ops_bypass()
CVE-2024-57944 iio: adc: ti-ads1298: Add NULL check in ads1298_init
CVE-2024-57930 tracing: Have process_string() also allow arrays
CVE-2024-57942 netfs: Fix ceph copy to cache on write-begin
CVE-2024-57941 netfs: Fix the (non-)cancellation of copy when cache is temporarily disabled
CVE-2024-57940 exfat: fix the infinite loop in exfat_readdir()
CVE-2024-57939 riscv: Fix sleeping in invalid context in die()
CVE-2024-57938 net/sctp: Prevent autoclose integer overflow in sctp_association_init()

Showing top 20 of 25 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21656

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