Local denial of service in Linux kernel nvmet-tcp

1) NULL pointer dereference

EUVDB-ID: #VU89244

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2023-52454

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 a NULL pointer dereference error within the nvmet_tcp_build_pdu_iovec() function in drivers/nvme/target/tcp.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.4.268

External links

http://git.kernel.org/stable/c/ee5e7632e981673f42a50ade25e71e612e543d9d
http://git.kernel.org/stable/c/f775f2621c2ac5cc3a0b3a64665dad4fb146e510
http://git.kernel.org/stable/c/4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d
http://git.kernel.org/stable/c/2871aa407007f6f531fae181ad252486e022df42
http://git.kernel.org/stable/c/24e05760186dc070d3db190ca61efdbce23afc88
http://git.kernel.org/stable/c/70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68
http://git.kernel.org/stable/c/efa56305908ba20de2104f1b8508c6a7401833be

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.