Vulnerability identifier: #VU93253

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-2021-47252

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 batadv_iv_ogm_emit() function in net/batman-adv/bat_iv_ogm.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/45011f2973f6b52cf50db397bb27bf805f5f0e7f
http://git.kernel.org/stable/c/6031daaaf6d5c359c99dfffa102e332df234ff09
http://git.kernel.org/stable/c/77a99aad5bc3ea105806ebae6be3cbadc2fc615e
http://git.kernel.org/stable/c/e8e9d2968a9d08bf5c683afca182f1537edebf8d
http://git.kernel.org/stable/c/e7fbd8184fa9e85f0d648c499841cb7ff6dec9f4
http://git.kernel.org/stable/c/282baa8104af44e04c4af3e7f933b44267c7f86f
http://git.kernel.org/stable/c/2eb4e0b3631832a4291c8bf4c9db873f60b128c8
http://git.kernel.org/stable/c/9f460ae31c4435fd022c443a6029352217a16ac1

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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.