Vulnerability identifier: #VU90491

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-2021-47333

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 alcor_pci_init_check_aspm() function in drivers/misc/cardreader/alcor_pci.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/d2639ffdcad463b358b6bef8645ff81715daffcb
http://git.kernel.org/stable/c/58f69684ba03e5b0e0a3ae844a845280c0f06309
http://git.kernel.org/stable/c/717cf5ae52322ddbdf3ac2c584b34c5970b0d174
http://git.kernel.org/stable/c/09d154990ca82d14aed2b72796f6c8845e2e605d
http://git.kernel.org/stable/c/3ce3e45cc333da707d4d6eb433574b990bcc26f5

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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.