#VU105140 NULL pointer dereference in Linux kernel - CVE-2025-21810

Vulnerability identifier: #VU105140

Vulnerability 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-2025-21810

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to NULL pointer dereference within the class_dev_iter_init() and class_dev_iter_next() functions in drivers/base/class.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 - 6.6.75

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External links
https://git.kernel.org/stable/c/1614e75d1a1b63db6421c7a4bf37004720c7376c
https://git.kernel.org/stable/c/5c504e9767b947cf7d4e29b811c0c8b3c53242b7
https://git.kernel.org/stable/c/e128f82f7006991c99a58114f70ef61e937b1ac1
https://git.kernel.org/stable/c/f4b9bc823b0cfdebfed479c0e87d6939c7562e87
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.76

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?