NULL pointer dereference in Linux kernel scsi ibmvscsi driver

1) NULL pointer dereference

EUVDB-ID: #VU90535

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-2023-52811

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 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: 5.15 - 6.7 rc7

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.15:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.15:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.15:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.15:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.15:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.15:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.15:rc6:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.15:rc7:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.15.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.15.1:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/e1d1f79b1929dce470a5dc9281c574cd58e8c6c0
https://git.kernel.org/stable/c/88984ec4792766df5a9de7a2ff2b5f281f94c7d4
https://git.kernel.org/stable/c/d2af4ef80601224b90630c1ddc7cd2c7c8ab4dd8
https://git.kernel.org/stable/c/8bbe784c2ff28d56ca0c548aaf3e584edc77052d
https://git.kernel.org/stable/c/b39f2d10b86d0af353ea339e5815820026bca48f
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.140
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.64
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.13
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.3
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7

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.