Description
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
Solution(s)
redhat-upgrade-kernel redhat-upgrade-kernel-rt
ReferencesCVE-2021-20321 RHSA-2021:5227 RHSA-2021:5241