Vulnerability identifier: #VU93648

Vulnerability risk: Low

CVSSv3.1: 6.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-46950

CWE-ID: CWE-399

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 execute arbitrary code.

The vulnerability exists due to improper management of internal resources within the raid1_end_write_request() function in drivers/md/raid1.c. A local user can execute arbitrary code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/12216d0919b64ee2ea5dc7a50e455670f44383d5
http://git.kernel.org/stable/c/a6e17cab00fc5bf85472434c52ac751426257c6f
http://git.kernel.org/stable/c/6920cef604fa57f9409e3960413e9cc11f5c5a40
http://git.kernel.org/stable/c/661061a45e32d8b2cc0e306da9f169ad44011382
http://git.kernel.org/stable/c/59452e551784b7a57a45d971727e9db63b192515
http://git.kernel.org/stable/c/538244fba59fde17186322776247cd9c05be86dd
http://git.kernel.org/stable/c/2417b9869b81882ab90fd5ed1081a1cb2d4db1dd

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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.