kernel is vulnerable to denial of service. A use-after-free vulnerability occurs when referencing inode of removed superblock in get_futex_key()
.
access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/index
access.redhat.com/errata/RHSA-2020:4609
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=1874311
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8019ad13ef7f64be44d4f892af9c840179009254