#VU90633 NULL pointer dereference in Linux kernel - CVE-2021-47095

Vulnerability identifier: #VU90633

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-2021-47095

CWE-ID: CWE-476

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 NULL pointer dereference within the ssif_probe() function in drivers/char/ipmi/ipmi_ssif.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/8efd6a3391f7b0b19fb0c38e50add06ca30c94af
https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c
https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29
https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15

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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.