#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: All versions

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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

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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.