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RHSA Kernel Upgrade

Written on:April 28, 2019
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Actualizacion de Kernel para RHSA

Se ha liberado una actualización en el kernel (core de Sistema operativo basado en Linux) importante.

Se solucionan las siguientes vulnerabilidades.

  • Kernel: KVM: potential use-after-free via kvm_ioctl_create_device() (CVE-2019-6974)
  • Kernel: KVM: nVMX: use-after-free of the hrtimer for emulation of the preemption timer (CVE-2019-7221)

Se solucionaron los siguientes BUGS:

  • rbd: avoid corruption on partially completed bios [rhel-7.6.z] (BZ#1672514)
  • xfs_vm_writepages deadly embrace between kworker and user task. [rhel-7.6.z] (BZ#1673281)
  • Offload Connections always get vlan priority 0
  • [NOKIA] RHEL sends flood of Neighbour Solicitations under specific conditions [rhel-7.6.z] (BZ#1677179)
  • RHEL 7.6 – Host crash occurred on NVMe/IB system while running controller reset [rhel-7.6.z] (BZ#1678214)
  • [rhel7] raid0 md workqueue deadlock with stacked md devices [rhel-7.6.z] (BZ#1678215)
  • [PureStorage7.6]nvme disconnect following an unsuccessful Admin queue creation causes kernel panic [rhel-7.6.z] (BZ#1678216)
  • RFC: Regression with -fstack-check in ‘backport upstream large stack guard patch to RHEL6’ patch [rhel-7.6.z] (BZ#1678221)
  • [Hyper-V] [RHEL 7.6]hv_netvsc: Fix a network regression after ifdown/ifup [rhel-7.6.z] (BZ#1679997)
  • rtc_cmos: probe of 00:01 failed with error -16
  • ACPI WDAT watchdog update [rhel-7.6.z] (BZ#1683079)
  • high ovs-vswitchd CPU usage when VRRP over VXLAN tunnel causing qrouter fail-over [rhel-7.6.z] (BZ#1683093)
  • Openshift node drops outgoing POD traffic due to NAT hashtable race in __ip_conntrack_confirm() [rhel-7.6.z] (BZ#1686766)
  • [Backport] [v3,2/2] net: igmp: Allow user-space configuration of igmp unsolicited report interval [rhel-7.6.z] (BZ#1686771)
  • [RHEL7.6]: Intermittently seen FIFO parity error on T6225-SO adapter [rhel-7.6.z] (BZ#1687487)
  • The number of unsolict report about IGMP is incorrect [rhel-7.6.z] (BZ#1688225)
  • RDT driver causing failure to boot on AMD Rome system with more than 255 CPUs [rhel-7.6.z] (BZ#1689120)
  • mpt3sas_cm0: fault_state(0x2100)! [rhel-7.6.z] (BZ#1689379)
  • rwsem in inconsistent state leading system to hung [rhel-7.6.z] (BZ#1690323)

Se  recomienda actualizar el kernel para solucionar o mitigar errores/vulnerabilidades, cabe constatar que aunque la actualización de Kernel es importante, se debe de hacer un análisis profundo sobre el impacto al funcionamiento del servidor.

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