CVE-2019-20096

A flaw was found in the Linux kernel’s implementation of the Datagram Congestion Control Protocol (DCCP). A local attacker with access to the system can create DCCP sockets to cause a memory leak and repeat this operation to exhaust all memory and panic the system.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

As the DCCP module will be auto-loaded when required, its use can be disabled. Red Hat Enterprise Linux 7.5 (and later) and 8.0 (and later) already have this disabled, but for any other version, the system can prevent the module from loading with the following instructions :

echo "install dccp /bin/true" >> /etc/modprobe.d/disable-dccp.conf

The system will need to be restarted if the DCCP modules are loaded. In most circumstances, the DCCP kernel modules will be unable to be unloaded while any network interfaces are active and the protocol is in use.

If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.