#VU93309 Input validation error in Linux kernel - CVE-2021-47611

Vulnerability identifier: #VU93309

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-47611

CWE-ID: CWE-20

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 improper input validation within the ieee802_11_parse_elems_crc() function in net/mac80211/util.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
https://git.kernel.org/stable/c/03029bb044ccee60adbc93e70713f3ae58abc3a1
https://git.kernel.org/stable/c/a19cf6844b509d44ecbd536f33d314d91ecdd2b5
https://git.kernel.org/stable/c/7fd214fc7f2ee3a89f91e717e3cfad55f5a27045
https://git.kernel.org/stable/c/c62b16f98688ae7bc0ab23a6490481f4ce9b3a49
https://git.kernel.org/stable/c/768c0b19b50665e337c96858aa2b7928d6dcf756

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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.