#VU104992 NULL pointer dereference in Linux kernel - CVE-2025-21783

Vulnerability identifier: #VU104992

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-2025-21783

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 gpiochip_get_ngpios() function in drivers/gpio/gpiolib.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/189fb76215e479c10731baabb50f1a352d2078f5
https://git.kernel.org/stable/c/4d9b2b62e1136d10f661ec4c0c268140b6f74f4f
https://git.kernel.org/stable/c/7b4aebeecbbd5b5fe73e35fad3f62ed21aa7ef44
https://git.kernel.org/stable/c/a7052afa9eae2239e25943baa8817a6a56e8aa68

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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.