CVE-2019-19083

Published: 18 November 2019

Memory leaks in *clock_source_create() functions under drivers/gpu/drm/amd/display/dc in the Linux kernel before 5.3.8 allow attackers to cause a denial of service (memory consumption). This affects the dce112_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c, the dce100_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c, the dcn10_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c, the dcn20_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c, the dce120_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c, the dce110_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c, and the dce80_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c, aka CID-055e547478a1.

From the Ubuntu Security Team

It was discovered that the AMD Display Engine Driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attack could use this to cause a denial of service (memory exhaustion).

Status

Severity score breakdown

References

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.8
• https://github.com/torvalds/linux/commit/055e547478a11a6360c7ce05e2afc3e366968a12
• https://ubuntu.com/security/notices/USN-4208-1
• https://ubuntu.com/security/notices/USN-4226-1
• https://ubuntu.com/security/notices/USN-4227-1
• https://ubuntu.com/security/notices/USN-4227-2
• https://www.cve.org/CVERecord?id=CVE-2019-19083
• NVD
• Launchpad
• Debian