CVE-2019-12819: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days.

An issue was discovered in the Linux kernel before 5.0. The function __mdiobus_register() in drivers/net/phy/mdio_bus.c calls put_device(), which will trigger a fixed_mdio_bus_init use-after-free. This will cause a denial of service.

Affected products

• Linux Linux Kernel: before 5.0 (fixed in 5.0)

Published 2019-06-14. Last modified 2026-06-17.