Vulnerability identifier: #VU93254

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-2021-47396

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 perform a denial of service (DoS) attack.

The vulnerability exists due to resource management error within the mac80211_hwsim_beacon() function in drivers/net/wireless/mac80211_hwsim.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
http://git.kernel.org/stable/c/9bee85de2c8155388c09a2e1530a243ec1c96f05
http://git.kernel.org/stable/c/2c204cf594df3b9468368dc9d0b24d482d93cda7
http://git.kernel.org/stable/c/ed2adf69e29848d1eb9df99633dde655421c92ed
http://git.kernel.org/stable/c/313bbd1990b6ddfdaa7da098d0c56b098a833572

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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.