The SUSE Linux Enterprise 12 SP3 Teradata kernel was updated to receive various security and bugfixes.
The following security bugs were fixed:
- CVE-2018-3620: Local attackers on baremetal systems could use speculative code patterns on hyperthreaded processors to read data present in the L1 Datacache used by other hyperthreads on the same CPU core, potentially leaking sensitive data. (bnc#1087081). - CVE-2018-3646: Local attackers in virtualized guest systems could use speculative code patterns on hyperthreaded processors to read data present in the L1 Datacache used by other hyperthreads on the same CPU core, potentially leaking sensitive data, even from other virtual machines or the host system. (bnc#1089343). - CVE-2018-5391 aka 'FragmentSmack': A flaw in the IP packet reassembly could be used by remote attackers to consume lots of CPU time (bnc#1103097). - CVE-2018-5390 aka 'SegmentSmack': The Linux kernel could be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service (bnc#1102340). - CVE-2018-14734: drivers/infiniband/core/ucma.c allowed ucma_leave_multicast to access a certain data structure after a cleanup step in ucma_process_join, which allowed attackers to cause a denial of service (use-after-free) (bnc#1103119).
The following non-security bugs were fixed:
- cpu/hotplug: Add sysfs state interface (bsc#1089343). - cpu/hotplug: Provide knobs to control SMT (bsc#1089343). - cpu/hotplug: Split do_cpu_down() (bsc#1089343). - sched/smt: Update sched_smt_present at runtime (bsc#1089343). - x86/CPU/AMD: Do not check CPUID max ext level before parsing SMP info (bsc#1089343). - x86/CPU/AMD: Move TOPOEXT reenablement before reading smp_num_siblings (bsc#1089343). Update config files. - x86/apic: Ignore secondary threads if nosmt=force (bsc#1089343). - x86/cpu/AMD: Evaluate smp_num_siblings early (bsc#1089343). - x86/cpu/AMD: Remove the pointless detect_ht() call (bsc#1089343). - x86/cpu/common: Provide detect_ht_early() (bsc#1089343). - x86/cpu/intel: Evaluate smp_num_siblings early (bsc#1089343). - x86/cpu/topology: Provide detect_extended_topology_early() (bsc#1089343). - x86/cpu: Remove the pointless CPU printout (bsc#1089343). - x86/mm: Simplify p[g4um]d_page() macros (1087081). - x86/smp: Provide topology_is_primary_thread() (bsc#1089343). - x86/smpboot: Do not use smp_num_siblings in __max_logical_packages calculation (bsc#1089343). - x86/topology: Add topology_max_smt_threads() (bsc#1089343). - x86/topology: Provide topology_smt_supported() (bsc#1089343).
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