In the Linux kernel, the following vulnerability has been resolved:

xen: Add support for XenServer 6.1 platform device

On XenServer on Windows machine a platform device with ID 2 instead of
1 is used.

This device is mainly identical to device 1 but due to some Windows
update behaviour it was decided to use a device with a different ID.

This causes compatibility issues with Linux which expects, if Xen
is detected, to find a Xen platform device (5853:0001) otherwise code
will crash due to some missing initialization (specifically grant
tables). Specifically from dmesg

    RIP: 0010:gnttab_expand+0x29/0x210
    Code: 90 0f 1f 44 00 00 55 31 d2 48 89 e5 41 57 41 56 41 55 41 89 fd
          41 54 53 48 83 ec 10 48 8b 05 7e 9a 49 02 44 8b 35 a7 9a 49 02
          <8b> 48 04 8d 44 39 ff f7 f1 45 8d 24 06 89 c3 e8 43 fe ff ff
          44 39
    RSP: 0000:ffffba34c01fbc88 EFLAGS: 00010086
    ...

The device 2 is presented by Xapi adding device specification to
Qemu command line.

https://git.kernel.org/stable/c/02d850de9495699f2029886a6a69f0ed07a39b84

https://git.kernel.org/stable/c/0fb6c439d265f09785a561fd2c637af567641cab

https://git.kernel.org/stable/c/2356f15caefc0cc63d9cc5122641754f76ef9b25

https://git.kernel.org/stable/c/5239ba49ad23a2285b4c2d15bec71566d32e0300

https://git.kernel.org/stable/c/55c3a07c0d96f5328e8fd5ffbf1448b60683f6fd

https://git.kernel.org/stable/c/7258b92ceff342912945eaaf8787ca3b83dbae21

https://git.kernel.org/stable/c/baedd1ef924d2b04d6223e0e1633e2d84fee6763

https://git.kernel.org/stable/c/f5363ffdabc2a281bd0023584944e3d0c25dfcd3