Out-of-bounds read in Linux kernel pinctrl mediatek driver

1) Out-of-bounds read

EUVDB-ID: #VU90346

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-2021-47083

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the mtk_xt_get_gpio_n() function in drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.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

External links

http://git.kernel.org/stable/c/f373298e1bf0c6ea097c0bcc558dc43ad53e421f
http://git.kernel.org/stable/c/441d3873664d170982922c5d2fc01fa89d9439ed
http://git.kernel.org/stable/c/fb563baa3eb8e7a15f2cff3c2695e2cca0493e69
http://git.kernel.org/stable/c/2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d

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.