The Siemens R3964 line discipline driver in drivers/tty/n_r3964.c in the Linux kernel before 5.0.8 has multiple race conditions.
lists.opensuse.org/opensuse-security-announce/2019-05/msg00037.html
lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html
lists.opensuse.org/opensuse-security-announce/2019-05/msg00071.html
www.openwall.com/lists/oss-security/2019/04/29/1
cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.112
cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.35
cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.169
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.8
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c7084edc3f6d67750f50d4183134c4fb5712a5c8
github.com/torvalds/linux/commit/c7084edc3f6d67750f50d4183134c4fb5712a5c8
lists.debian.org/debian-lts-announce/2019/05/msg00041.html
lists.debian.org/debian-lts-announce/2019/05/msg00042.html
lists.debian.org/debian-lts-announce/2019/06/msg00011.html
seclists.org/bugtraq/2019/Jun/26
security.netapp.com/advisory/ntap-20190517-0005/
support.f5.com/csp/article/K50222414
www.debian.org/security/2019/dsa-4465