#VU106731 NULL pointer dereference in Linux kernel - CVE-2025-21917

Vulnerability identifier: #VU106731

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-2025-21917

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 usbhs_remove() function in drivers/usb/renesas_usbhs/common.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12 - 6.12.18

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External links
https://git.kernel.org/stable/c/3248c1f833f924246cb98ce7da4569133c1b2292
https://git.kernel.org/stable/c/394965f90454d6f00fe11879142b720c6c1a872e
https://git.kernel.org/stable/c/4ca078084cdd5f32d533311d6a0b63a60dcadd41
https://git.kernel.org/stable/c/4cd847a7b630a85493d0294ad9542c21aafaa246
https://git.kernel.org/stable/c/552ca6b87e3778f3dd5b87842f95138162e16c82
https://git.kernel.org/stable/c/830818c8e70c0364e377f0c243b28061ef7967eb
https://git.kernel.org/stable/c/d50f5c0cd949593eb9a3d822b34d7b50046a06b7
https://git.kernel.org/stable/c/e5aac1c9b2974636db7ce796ffa6de88fa08335e
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.19

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?