A flaw was found in the Linux kernel before 5.9-rc4. A failure of the file system metadata validator in XFS can cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt. This can lead to the filesystem being shutdown, or otherwise rendered inaccessible until it is remounted, leading to a denial of service. The highest threat from this vulnerability is to system availability.
https://usn.ubuntu.com/4576-1/
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14385
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00001.html