Improper error handling in Linux kernel batman-adv

Published: 2024-06-03

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2021-47482
CWE-ID	CWE-388
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Linux kernel Operating systems & Components / Operating system
Vendor	Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper error handling

EUVDB-ID: #VU90930

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-2021-47482

CWE-ID: CWE-388 - Error Handling

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper error handling within the batadv_tt_init() function in net/batman-adv/translation-table.c, within the batadv_nc_mesh_init() function in net/batman-adv/network-coding.c, within the batadv_mesh_init() function in net/batman-adv/main.c, within the batadv_bla_init() function in net/batman-adv/bridge_loop_avoidance.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

CPE2.3

External links

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.