Use of uninitialized resource in Linux kernel hwmon driver



| Updated: 2025-05-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-21656
CWE-ID CWE-908
Exploitation vector Local
Public exploit N/A
Vulnerable software
Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use of uninitialized resource

EUVDB-ID: #VU103132

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21656

CWE-ID: CWE-908 - Use of Uninitialized Resource

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to use of uninitialized resource within the drivetemp_scsi_command() function in drivers/hwmon/drivetemp.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.6 - 6.12.9

CPE2.3 External links

https://git.kernel.org/stable/c/42268d885e44af875a6474f7bba519cc6cea6a9d
https://git.kernel.org/stable/c/53e25b10a28edaf8c2a1d3916fd8929501a50dfc
https://git.kernel.org/stable/c/82163d63ae7a4c36142cd252388737205bb7e4b9
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.10
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.72


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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