An issue was discovered in RDS protocol in the Linux kernel. There is an out of bounds write and read in the function rds_recv_track_latency which may allow an attacker with a local account to corrupt memory or escalate privileges. No Red Hat Enterprise Linux versions ship the affected code at this time. Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=780e982905bef61d13496d9af5310bf4af3a64d3
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1757359]
This was fixed in the 4.11 kernel and has never impacted any release of Fedora which is currently supported.
Mitigation: As the RDS module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions: # echo "install rds /bin/true" >> /etc/modprobe.d/disable-rds.conf The system will need to be restarted if the RDS modules are loaded. In most circumstances, the RDS kernel modules will be unable to be unloaded while any network interfaces are active and the protocol is in use. If the system requires this module to work correctly, this mitigation may not be suitable. If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.