Vulnerability identifier: #VU92372

Vulnerability 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-2021-47602

CWE-ID: CWE-908

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 use of uninitialized resource within the ieee80211_sta_tx_wmm_ac_notify() function in net/mac80211/mlme.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/69f054d6642c8f6173724ce17e7ee3ff66b8f682
http://git.kernel.org/stable/c/46b9e29db2012a4d2a40a26101862e002ccf387b
http://git.kernel.org/stable/c/eed897a22230e3231a740eddd7d6d95ba476625f
http://git.kernel.org/stable/c/42d08e97b196479f593499e887a9ab81446a34b9
http://git.kernel.org/stable/c/d5e568c3a4ec2ddd23e7dc5ad5b0c64e4f22981a

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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.