Linux kernel is prone to a local memory-corruption vulnerability. An attacker can exploit this issue to cause a denial-of-service condition, denying service to legitimate users. Given the nature of this issue, attackers may also be able to execute arbitrary code, but this has not been confirmed. Versions prior to Linux kernel 5.3.4 are vulnerable.
Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.
Allow only trusted individuals to have user accounts and local access to the resources.
Implement multiple redundant layers of security.
Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as non-executable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploits of memory-corruption vulnerabilities.
Updates are available. Please see the references or vendor advisory for more information.
www.kernel.org/
bugs.launchpad.net/ubuntu/+source/linux/+bug/1847478
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.4
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca7a03c4175366a92cee0ccc4fec0038c3266e26
github.com/torvalds/linux/commit/ca7a03c4175366a92cee0ccc4fec0038c3266e26