Vulnerability identifier: #VU90535

Vulnerability 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-2023-52811

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 NULL pointer dereference within the ibmvfc_get_event(), ibmvfc_queuecommand(), ibmvfc_bsg_timeout(), ibmvfc_bsg_plogi(), ibmvfc_bsg_request(), ibmvfc_reset_device(), ibmvfc_init_tmf(), ibmvfc_cancel_all_mq(), ibmvfc_abort_task_set(), ibmvfc_tgt_send_prli(), ibmvfc_tgt_send_plogi(), __ibmvfc_tgt_get_implicit_logout_evt(), ibmvfc_tgt_implicit_logout(), ibmvfc_tgt_move_login(), ibmvfc_adisc_timeout(), ibmvfc_tgt_adisc(), ibmvfc_tgt_query_target(), ibmvfc_discover_targets(), ibmvfc_channel_setup(), ibmvfc_channel_enquiry(), ibmvfc_npiv_login() and ibmvfc_npiv_logout() functions in drivers/scsi/ibmvscsi/ibmvfc.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/e1d1f79b1929dce470a5dc9281c574cd58e8c6c0
http://git.kernel.org/stable/c/88984ec4792766df5a9de7a2ff2b5f281f94c7d4
http://git.kernel.org/stable/c/d2af4ef80601224b90630c1ddc7cd2c7c8ab4dd8
http://git.kernel.org/stable/c/8bbe784c2ff28d56ca0c548aaf3e584edc77052d
http://git.kernel.org/stable/c/b39f2d10b86d0af353ea339e5815820026bca48f

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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.