Vulnerability identifier: #VU92355

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-2021-47603

CWE-ID: CWE-667

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 locking within the kauditd_send_queue() and audit_net_init() functions in kernel/audit.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/75fdb751f84727d614deea0571a1490c3225d83a
http://git.kernel.org/stable/c/8389f50ceb854cb437fefb9330d5024ed3c7c1f5
http://git.kernel.org/stable/c/0d3277eabd542fb662be23696e5ec9f390d688e1
http://git.kernel.org/stable/c/4cc6badff97f74d0fce65f9784b5df3b64e4250b
http://git.kernel.org/stable/c/a5f4d17daf2e6cd7c1d9676b476147f6b4ac53f2
http://git.kernel.org/stable/c/f4b3ee3c85551d2d343a3ba159304066523f730f

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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.