CVE-2020-29569

An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.

• Debian

  OS
  Debian
  10.09.0

• Linux Kernel

  OS
  Linux
  4.4.80 – 4.4.254 (bez)4.9.36 – 4.9.249 (bez)4.11.9 – 4.12 (bez)4.12 – 4.14.213 (bez)4.15 – 4.19.164 (bez)5.5 – 5.10.4 (bez)4.20 – 5.4.86 (bez)4.1.44 – 4.2 (bez)

• Netapp Hci Compute Node

  HW
  Netapp
  wszystkie wersje

• Netapp Hci Compute Node Bios

  OS
  Netapp
  wszystkie wersje

• Netapp Solidfire \& Hci Management Node

  APP
  Netapp
  wszystkie wersje

• Netapp Solidfire \& Hci Storage Node

  APP
  Netapp
  wszystkie wersje

• Xen

  OS
  Xen
  ≤ 4.14.1