An exploitable code execution vulnerability exists in the quota file functionality of E2fsprogs 1.45.3. A specially crafted ext4 partition can cause an out-of-bounds write on the heap, resulting in code execution. An attacker can corrupt a partition to trigger this vulnerability.
https://www.debian.org/security/2019/dsa-4535
https://usn.ubuntu.com/4142-2/
https://usn.ubuntu.com/4142-1/
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0887
https://security.netapp.com/advisory/ntap-20200115-0002/
https://security.gentoo.org/glsa/202003-05
https://seclists.org/bugtraq/2019/Sep/58
https://lists.debian.org/debian-lts-announce/2019/09/msg00029.html