The AMD Ryzen processor with AGESA microcode through 2017-01-27 allows local users to cause a denial of service (system hang) via an application that makes a long series of FMA3 instructions, as demonstrated by the Flops test suite.
https://www.techpowerup.com/231536/amd-ryzen-machine-crashes-to-a-sequence-of-fma3-instructions
https://news.ycombinator.com/item?id=13924192
http://www.securityfocus.com/bid/97098
http://forum.hwbot.org/showthread.php?t=167605
http://forum.hwbot.org/showpost.php?p=480524
Source: Mitre, NVD
Published: 2017-03-25
Updated: 2025-04-20
Base Score: 4.9
Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C
Severity: Medium
Base Score: 5.5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.00058