NULL pointer dereference in Linux kernel scsi driver

1) NULL pointer dereference

EUVDB-ID: #VU92340

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-2021-47578

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 resp_verify() and resp_report_zones() functions in drivers/scsi/scsi_debug.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

CPE2.3

External links

http://git.kernel.org/stable/c/aa1f912712a109b6306746133de7e5343f016b26
http://git.kernel.org/stable/c/47d11d35203b0aa13533634e270fe2c3610e531b
http://git.kernel.org/stable/c/3344b58b53a76199dae48faa396e9fc37bf86992

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.