Vulnerability identifier: #VU93741

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2021-46919

CWE-ID: CWE-269

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 improperly imposed permissions within the wq_size_store() function in drivers/dma/idxd/sysfs.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/4ecf25595273203010bc8318c4aee60ad64037ae
http://git.kernel.org/stable/c/05b7791c4c4aa8304368fdc55ae911f6b34e7281
http://git.kernel.org/stable/c/0fff71c5a311e1264988179f7dcc217fda15fadd

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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.