#VU90587 NULL pointer dereference in Linux kernel - CVE-2021-47184

Vulnerability identifier: #VU90587

Vulnerability risk: Low

CVSSv4.0: [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-2021-47184

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 i40e_sync_filters_subtask() and i40e_vsi_release() functions in drivers/net/ethernet/intel/i40e/i40e_main.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
http://git.kernel.org/stable/c/78f2a9e831f9610e3655a0be5e675e1aa2472089
http://git.kernel.org/stable/c/87c421ab4a43433cb009fea44bbbc77f46913e1d
http://git.kernel.org/stable/c/c30162da91327e4cdf7cd03079f096bb3654738c
http://git.kernel.org/stable/c/f866513ead4370402428ef724b03c3312295c178
http://git.kernel.org/stable/c/e91e8427a1e1633a0261e3bb0201c836ac5b3890
http://git.kernel.org/stable/c/37d9e304acd903a445df8208b8a13d707902dea6

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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.