NULL pointer dereference in Linux kernel base driver



| Updated: 2025-05-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-21810
CWE-ID CWE-476
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) NULL pointer dereference

EUVDB-ID: #VU105140

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 - NULL Pointer Dereference

Exploit availability: No

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

CPE2.3 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


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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