In the Linux kernel 4.12, 3.10, 2.6 and possibly earlier versions a race condition vulnerability exists in the sound system, this can lead to a deadlock and denial of service condition.
seclists.org/oss-sec/2018/q1/51
www.securityfocus.com/bid/104606
access.redhat.com/errata/RHSA-2018:0654
access.redhat.com/errata/RHSA-2018:0676
access.redhat.com/errata/RHSA-2018:1062
access.redhat.com/errata/RHSA-2018:2390
access.redhat.com/errata/RHSA-2019:1483
help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
lists.debian.org/debian-lts-announce/2018/05/msg00000.html
usn.ubuntu.com/3631-1/
usn.ubuntu.com/3631-2/
usn.ubuntu.com/3798-1/
usn.ubuntu.com/3798-2/
www.debian.org/security/2018/dsa-4187
www.oracle.com/security-alerts/cpujul2020.html
www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html