Vulnerability identifier: #VU24446

Vulnerability risk: Low

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-2019-19083

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 "clock_source_create()" functions under drivers/gpu/drm/amd/display/dc in the Linux kernel before 5.3.8 allow a local user to cause a denial of service (memory consumption).

This vulnerability affects the following functions:

• dce112_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
  

• dce100_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c
  

• dcn10_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c

• dcn20_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
  

• dce120_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
  

• dce110_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c
  

• dce80_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.3 - 5.3.7

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External links
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.8
http://github.com/torvalds/linux/commit/055e547478a11a6360c7ce05e2afc3e366968a12
http://security.netapp.com/advisory/ntap-20191205-0001/
http://usn.ubuntu.com/4208-1/

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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.