Vulnerability identifier: #VU90059

Vulnerability risk: Low

CVSSv3.1: 7.7 [AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47479

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the r871xu_dev_remove() function in drivers/staging/rtl8712/usb_intf.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/c430094541a80575259a94ff879063ef01473506
http://git.kernel.org/stable/c/befd23bd3b17f1a3f9c943a8580b47444c7c63ed
http://git.kernel.org/stable/c/a65c9afe9f2f55b7a7fb4a25ab654cd4139683a4
http://git.kernel.org/stable/c/c052cc1a069c3e575619cf64ec427eb41176ca70

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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.