The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.
openSUSE 13.1 openSUSE 13.2 openSUSE Leap 15.0 openSUSE Leap 42.1 openSUSE Tumbleweed SUSE Linux Enterprise Build System Kit 12 SUSE Linux Enterprise Build System Kit 12 SP1 SUSE Linux Enterprise Desktop 11 SP4 SUSE Linux Enterprise Desktop 12 SUSE Linux Enterprise Desktop 12 SP1 SUSE Linux Enterprise Desktop 12 SP4 SUSE Linux Enterprise Desktop 15 SUSE Linux Enterprise High Availability 12 SP4 SUSE Linux Enterprise High Availability 15 SUSE Linux Enterprise High Performance Computing 12 SUSE Linux Enterprise High Performance Computing 12 SP4 SUSE Linux Enterprise High Performance Computing 15 SUSE Linux Enterprise Live Patching 12 SUSE Linux Enterprise Module for Basesystem 15 SUSE Linux Enterprise Module for Development Tools 15 SUSE Linux Enterprise Module for Legacy Software 15 SUSE Linux Enterprise Module for Live Patching 15 SUSE Linux Enterprise Module for Public Cloud 12 SUSE Linux Enterprise Real Time Extension 11 SP4 SUSE Linux Enterprise Server 11 SP2-LTSS SUSE Linux Enterprise Server 11 SP3-LTSS SUSE Linux Enterprise Server 11 SP3-TERADATA SUSE Linux Enterprise Server 11 SP4 SUSE Linux Enterprise Server 12 SUSE Linux Enterprise Server 12 SP1 SUSE Linux Enterprise Server 12 SP3 SUSE Linux Enterprise Server 12 SP4 SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Server 15 SUSE Linux Enterprise Server for SAP Applications 11 SP2-LTSS SUSE Linux Enterprise Server for SAP Applications 11 SP3-LTSS SUSE Linux Enterprise Server for SAP Applications 11 SP3-TERADATA SUSE Linux Enterprise Server for SAP Applications 11 SP4 SUSE Linux Enterprise Server for SAP Applications 12 SUSE Linux Enterprise Server for SAP Applications 12 SP1 SUSE Linux Enterprise Server for SAP Applications 12 SP3 SUSE Linux Enterprise Server for SAP Applications 12 SP4 SUSE Linux Enterprise Server for SAP Applications 12 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SUSE Linux Enterprise Software Development Kit 11 SP4 SUSE Linux Enterprise Software Development Kit 12 SUSE Linux Enterprise Software Development Kit 12 SP1 SUSE Linux Enterprise Software Development Kit 12 SP4 SUSE Linux Enterprise Workstation Extension 12 SUSE Linux Enterprise Workstation Extension 12 SP1 SUSE Linux Enterprise Workstation Extension 12 SP4 SUSE Linux Enterprise Workstation Extension 15 SUSE OpenStack Cloud 5