Vulnerability identifier: #VU24339

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19065

CWE-ID: CWE-401

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 memory leak within the sdma_init() function in drivers/infiniband/hw/hfi1/sdma.c in the Linux kernel before 5.3.9 allows attackers to cause a denial of service (memory consumption) by triggering rhashtable_init() failures. A local user can perform a denial of service attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.8

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External links
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.9
http://github.com/torvalds/linux/commit/34b3be18a04ecdc610aae4c48e5d1b799d8689f6

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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.