NULL pointer dereference in Linux kernel probes kprobes

1) NULL pointer dereference

EUVDB-ID: #VU92918

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-2021-47618

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to NULL pointer dereference within the obj-$() function in arch/arm/probes/kprobes/Makefile. 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

http://git.kernel.org/stable/c/1515e72aae803fc6b466adf918e71c4e4c9d5b3d
http://git.kernel.org/stable/c/ba1863be105b06e10d0e2f6b1b8a0570801cfc71
http://git.kernel.org/stable/c/8b59b0a53c840921b625378f137e88adfa87647e

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.