#VU90646 NULL pointer dereference in Linux kernel - CVE-2021-47005

Vulnerability identifier: #VU90646

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-2021-47005

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 pci_epf_test_bind() function in drivers/pci/endpoint/functions/pci-epf-test.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/bbed83d7060e07a5d309104d25a00f0a24441428
https://git.kernel.org/stable/c/679ebad058b8168f10e63876d63b0877fd2fe784
https://git.kernel.org/stable/c/0169d4f0bee44fdfef908c13ed21fcb326c38695
https://git.kernel.org/stable/c/6613bc2301ba291a1c5a90e1dc24cf3edf223c03

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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.