An issue was discovered in the Linux kernel 4.18 through 5.6.11 when unprivileged user namespaces are allowed. A user can create their own PID namespace, and mount a FUSE filesystem. Upon interaction with this FUSE filesystem, if the userspace component is terminated via a kill of the PID namespace's pid 1, it will result in a hung task, and resources being permanently locked up until system reboot. This can result in resource exhaustion.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2020-05-09T17:35:50

Updated: 2024-08-05T02:53:09.326Z

Reserved: 2020-05-09T00:00:00

Link: CVE-2019-20794

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2020-05-09T18:15:11.157

Modified: 2021-07-21T11:39:23.747

Link: CVE-2019-20794

cve-icon Redhat

Severity : Moderate

Publid Date: 2020-05-09T00:00:00Z

Links: CVE-2019-20794 - Bugzilla