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SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2019:2948-1)

Description

The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bugfixes. The following security bugs were fixed : - CVE-2018-12207: Untrusted virtual machines on Intel CPUs could exploit a race condition in the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional. The Linux Kernel KVM hypervisor was adjusted to avoid page size changes in executable pages by splitting / merging huge pages into small pages as needed. More information can be found on https://www.suse.com/support/kb/doc/?id=7023735 - CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate sidechannel information leaks out of microarchitectural buffers, similar to the previously described 'Microarchitectural Data Sampling' attack. The Linux kernel was supplemented with the option to disable TSX operation altogether (requiring CPU Microcode updates on older systems) and better flushing of microarchitectural buffers (VERW). The set of options available is described in our TID at https://www.suse.com/support/kb/doc/?id=7024251 Other security fixes : CVE-2019-0154: Fixed a local denial of service via read of unprotected i915 registers. (bsc#1135966) CVE-2019-0155: Fixed privilege escalation in the i915 driver. Batch buffers from usermode could have escalated privileges via blitter command stream. (bsc#1135967) CVE-2019-16233: drivers/scsi/qla2xxx/qla_os.c did not check the alloc_workqueue return value, leading to a NULL pointer dereference. (bsc#1150457). CVE-2019-10220: Added sanity checks on the pathnames passed to the user space. (bsc#1144903). The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


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