description: The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.
problem types: NULL pointer dereference
affected:
{
product: Linux kernel through version 4.15
vendor: n/a
versions:
status: affected, version: Linux kernel through version 4.15
}