Scientific Linux Security Update : kernel on SL7.x x86_64 (20190423)

Security Fixes : - Kernel: KVM: potential use-after-free via kvmioctlcreatedevice CVE-2019-6974 - Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer CVE-2019-7221 Bug Fixes : - rbd: avoid corruption on partially completed bios rhel-7.6.z - xfsvmwritepages deadl...