Improper locking in Linux kernel spi driver

1) Improper locking

EUVDB-ID: #VU90737

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-2021-47469

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

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

The vulnerability exists due to improper locking within the LIST_HEAD(), spi_add_device(), spi_add_device_locked(), spi_register_controller() and spi_unregister_controller() functions in drivers/spi/spi.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/722ef19a161ce3fffb3d1b01ce2301c306639bdd
http://git.kernel.org/stable/c/6098475d4cb48d821bdf453c61118c56e26294f0

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.