A flaw was found in glusterfs server through versions 4.1.4 and 3.1.2 which allowed repeated usage of GF_META_LOCK_KEY xattr. A remote, authenticated attacker could use this flaw to create multiple locks for single inode by using setxattr repetitively resulting in memory exhaustion of glusterfs server node.
https://security.gentoo.org/glsa/201904-06
https://lists.debian.org/debian-lts-announce/2021/11/msg00000.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14660
https://access.redhat.com/errata/RHSA-2018:3470