#VU89244 NULL pointer dereference in Linux kernel - CVE-2023-52454

Vulnerability identifier: #VU89244

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-2023-52454

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 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, 5.4.268

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

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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.