Memory leak in Linux kernel scsi driver

1) Memory leak

EUVDB-ID: #VU91648

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-2021-47216

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the asc_prt_adv_board_info() function in drivers/scsi/advansys.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.4 - 5.16 rc8

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.0-57:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.7:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/06d7d12efb5c62db9dea15141ae2b322c2719515
https://git.kernel.org/stable/c/ad19f7046c24f95c674fbea21870479b2b9f5bab
https://git.kernel.org/stable/c/5612287991debe310c914600599bd59511ababfb
https://git.kernel.org/stable/c/f5a0ba4a9b5e70e7b2f767636d26523f9d1ac59d
https://git.kernel.org/stable/c/cc248790bfdcf879e3094fa248c85bf92cdf9dae
https://git.kernel.org/stable/c/055eced3edf5b675d12189081303f6285ef26511
https://git.kernel.org/stable/c/27490ae6a85a70242d80615ca74d0362a820d6a7
https://git.kernel.org/stable/c/d4996c6eac4c81b8872043e9391563f67f13e406
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.256
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.218
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.293
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.291
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.82
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.5
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.162

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.