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Test your applicationsUpgrade Oracle:7 kernel-uek-firmware to version 0:4.1.12-124.46.3.el7uek or higher.
This issue was patched in ELSA-2021-9002.
Note: Versions mentioned in the description apply only to the upstream kernel-uek-firmware package and not the kernel-uek-firmware package as distributed by Oracle.
See How to fix? for Oracle:7 relevant fixed versions and status.
In the Linux kernel 5.0.21, mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c, related to dump_orphan_list in fs/ext4/super.c.