NULL pointer dereference in Linux kernel endpoint functions driver

1) NULL pointer dereference

EUVDB-ID: #VU90646

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-2021-47005

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 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

External links

http://git.kernel.org/stable/c/bbed83d7060e07a5d309104d25a00f0a24441428
http://git.kernel.org/stable/c/679ebad058b8168f10e63876d63b0877fd2fe784
http://git.kernel.org/stable/c/0169d4f0bee44fdfef908c13ed21fcb326c38695
http://git.kernel.org/stable/c/6613bc2301ba291a1c5a90e1dc24cf3edf223c03

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.