This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2019-20794 →
DEBIAN-CVE-2019-20794
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 namespa...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
linux
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
linux
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
linux
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- advisory security-tracker.debian.org