Vulnerability identifier: #VU90836

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-2021-47475

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 IC3_VERSION BIT() and vmk80xx_alloc_usb_buffers() functions in drivers/staging/comedi/drivers/vmk80xx.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/5229159f1d052821007aff1a1beb7873eacf1a9f
http://git.kernel.org/stable/c/ec85bcff4ed09260243d8f39faba99e1041718ba
http://git.kernel.org/stable/c/40d2a7e278e2e7c0a5fd7e997e7eb63945bf93f7
http://git.kernel.org/stable/c/7a2021b896de1ad559d33b5c5cdd20b982242088
http://git.kernel.org/stable/c/199acd8c110e3ae62833c24f632b0bb1c9f012a9
http://git.kernel.org/stable/c/33d7a470730dfe7c9bfc8da84575cf2cedd60d00
http://git.kernel.org/stable/c/278484ae93297b1bb1ce755f9d3b6d95a48c7d47
http://git.kernel.org/stable/c/06ac746d57e6d32b062e220415c607b7e2e0fa50
http://git.kernel.org/stable/c/a23461c47482fc232ffc9b819539d1f837adf2b1

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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.