#VU90346 Out-of-bounds read in Linux kernel - CVE-2021-47083

Vulnerability identifier: #VU90346

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-2021-47083

CWE-ID: CWE-125

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 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

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External links
https://git.kernel.org/stable/c/f373298e1bf0c6ea097c0bcc558dc43ad53e421f
https://git.kernel.org/stable/c/441d3873664d170982922c5d2fc01fa89d9439ed
https://git.kernel.org/stable/c/fb563baa3eb8e7a15f2cff3c2695e2cca0493e69
https://git.kernel.org/stable/c/2d5446da5acecf9c67db1c9d55ae2c3e5de01f8d

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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.