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.
Advisories
Source ID Title
EUVD EUVD EUVD-2019-11331 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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

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 : Modified

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

Modified: 2024-11-21T04:39:22.780

Link: CVE-2019-20794

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2019-20794 - Bugzilla

cve-icon OpenCVE Enrichment

No data.