fs/ext4/extents.c in the Linux kernel through 5.1.2 does not zero out the unused memory region in the extent tree block, which might allow local users to obtain sensitive information by reading uninitialized data in the filesystem.
lists.opensuse.org/opensuse-security-announce/2019-05/msg00071.html
lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html
packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
www.securityfocus.com/bid/108372
access.redhat.com/errata/RHSA-2019:2029
access.redhat.com/errata/RHSA-2019:2043
access.redhat.com/errata/RHSA-2019:3309
access.redhat.com/errata/RHSA-2019:3517
github.com/torvalds/linux/commit/592acbf16821288ecdc4192c47e3774a4c48bb64
lists.debian.org/debian-lts-announce/2019/06/msg00010.html
lists.debian.org/debian-lts-announce/2019/06/msg00011.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GJGZIMGB72TL7OGWRMHIL43WHXFQWU4X/
seclists.org/bugtraq/2019/Jun/26
usn.ubuntu.com/4068-1/
usn.ubuntu.com/4068-2/
usn.ubuntu.com/4069-1/
usn.ubuntu.com/4069-2/
usn.ubuntu.com/4076-1/
usn.ubuntu.com/4095-2/
usn.ubuntu.com/4118-1/
www.debian.org/security/2019/dsa-4465