Red Hat Bugzilla – Bug 1263139
CVE-2015-6937 kernel: net: rds: NULL pointer dereference in net/rds/connection.c
Last modified: 2016-11-08 11:20:08 EST
It was found that the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation did not verify that an underlying transport exists when creating a connection to a remote server.
This could happen on sockets that were not properly bound before attempting to send a message.
A local attacker could use this flaw to crash the system by creating sockets at specific times to trigger a NULL pointer dereference on the system.
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1263140]
kernel-4.2.1-300.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
kernel-4.1.8-200.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
kernel-4.1.8-100.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
The patch is incomplete, complete fix can be found here:
MITRE assigned new CVE for the vulnerability that remains present after the original incomplete patch:
This issue did not affect kernel, kernel-rt, and realtime-kernel versions shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG as they do not include the Reliable Datagram Sockets (RDS) protocol implementation.