The Linux kernel before 5.4.2 mishandles ext4_expand_extra_isize, as demonstrated by use-after-free errors in __ext4_expand_extra_isize and ext4_xattr_set_entry, related to fs/ext4/inode.c and fs/ext4/super.c, aka CID-4ea99936a163. CREATE(Triage):(User=admin) [CVE-2019-19767|https://nvd.nist.gov/vuln/detail/CVE-2019-19767]
