CVE-2018-20482: GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).
![[bug history graph]](https://qa.debian.org/data/bts/graphs/t/tar.png){kind=link}