NULL pointer dereference in Linux kernel scsi qedf driver

1) NULL pointer dereference

EUVDB-ID: #VU90638

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-2021-47077

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 qedf_update_link_speed() function in drivers/scsi/qedf/qedf_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

External links

http://git.kernel.org/stable/c/a6362a737572f66051deb7637f3f77ddf7a4402f
http://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a
http://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f

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.