#VU90976 Use of uninitialized resource in Linux kernel - CVE-2021-47424

Vulnerability identifier: #VU90976

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-2021-47424

CWE-ID: CWE-908

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 use of uninitialized resource within the i40e_clear_interrupt_scheme() function 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/60ad4cde0ad28921f9ea25b0201c774b95ffa4b4
http://git.kernel.org/stable/c/17063cac4088b8e2fc0f633abddca5426ed58312
http://git.kernel.org/stable/c/97aeed72af4f83ae51534f0a2473ff52f8d66236
http://git.kernel.org/stable/c/75099439209d3cda439a1d9b00d19a50f0066fef
http://git.kernel.org/stable/c/2e5a20573a926302b233b0c2e1077f5debc7ab2e

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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.