Vulnerability identifier: #VU91623

Vulnerability risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47403

CWE-ID: CWE-401

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 memory leak within the ipoctal_port_activate() and ipoctal_cleanup() functions in drivers/ipack/devices/ipoctal.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/31398849b84ebae0d43a1cf379cb9895597f221a
http://git.kernel.org/stable/c/c0adb5a947dec6cff7050ec56d78ecd3916f9ce6
http://git.kernel.org/stable/c/dde4c1429b97383689f755ce92b4ed1e84a9c92b
http://git.kernel.org/stable/c/9c5b77a7ffc983b2429ce158b50497c5d3c86a69
http://git.kernel.org/stable/c/3253c87e1e5bc0107aab773af2f135ebccf38666
http://git.kernel.org/stable/c/7cea848678470daadbfdaa6a112b823c290f900c
http://git.kernel.org/stable/c/811178f296b16af30264def74c8d2179a72d5562
http://git.kernel.org/stable/c/bb8a4fcb2136508224c596a7e665bdba1d7c3c27

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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.