Vulnerability identifier: #VU91051

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-2021-47571

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 _rtl92e_pci_disconnect() function in drivers/staging/rtl8192e/rtl8192e/rtl_core.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/d43aecb694b10db9a4228ce2d38b5ae8de374443
http://git.kernel.org/stable/c/9186680382934b0e7529d3d70dcc0a21d087683b
http://git.kernel.org/stable/c/c0ef0e75a858cbd8618b473f22fbca36106dcf82
http://git.kernel.org/stable/c/bca19bb2dc2d89ce60c4a4a6e59609d4cf2e13ef
http://git.kernel.org/stable/c/2e1ec01af2c7139c6a600bbfaea1a018b35094b6
http://git.kernel.org/stable/c/8d0163cec7de995f9eb9c3128c83fb84f0cb1c64
http://git.kernel.org/stable/c/e27ee2f607fe6a9b923ef1fc65461c0613c97594
http://git.kernel.org/stable/c/b535917c51acc97fb0761b1edec85f1f3d02bda4

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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.