In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and unmounting can lead to a use-after-free in btrfs_queue_work in fs/btrfs/async-thread.c. CREATE(Triage):(User=admin) CVE-2019-19377 (https://nvd.nist.gov/vuln/detail/CVE-2019-19377)
