kernel is vulnerable to use-after-free vulnerability. It is possible due to a flaw in the function __mdiobus_register() in drivers/net/phy/mdio_bus.c.
lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html
lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html
www.securityfocus.com/bid/108768
access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.2_release_notes/index
access.redhat.com/errata/RHSA-2020:1769
access.redhat.com/security/updates/classification/#important
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6ff7b060535e87c2ae14dd8548512abfdda528fb
github.com/torvalds/linux/commit/6ff7b060535e87c2ae14dd8548512abfdda528fb