It was discovered that QEMU did not properly setup the virtio networkingfeatures available to its guests. A remote attacker could exploit this tocrash QEMU guests which use virtio networking on Linux kernels earlierthan 2.6.26. [More...]

==========================================================Ubuntu Security Notice USN-863-1          December 03, 2009
qemu-kvm vulnerability
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/458521
==========================================================
A security issue affects the following Ubuntu releases:

Ubuntu 9.10

This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.

The problem can be corrected by upgrading your system to the
following package versions:

Ubuntu 9.10:
  qemu-kvm                        0.11.0-0ubuntu6.3

After a standard system upgrade you need to restart any QEMU guests to
effect the necessary changes.

Details follow:

It was discovered that QEMU did not properly setup the virtio networking
features available to its guests. A remote attacker could exploit this to
crash QEMU guests which use virtio networking on Linux kernels earlier
than 2.6.26.


Updated packages for Ubuntu 9.10:

  Source archives:

          Size/MD5:    48984 14fa43af0ed17b918c50803f91b1480d
          Size/MD5:     1377 18f25eed2408085a81ad70f39d74a835
          Size/MD5:  4382897 440837a062967102a68e634d57eaf719

  amd64 architecture (Athlon64, Opteron, EM64T Xeon):

          Size/MD5:     9106 b15b1b8a62f13822a3932abd54a5f924
          Size/MD5:  2813520 49b26fe83d6c4a5c9befd6716a3431a9
          Size/MD5:   636074 d9f0b9d5ff621c8b56b9fca53c0ae5d2
          Size/MD5: 15469258 dd6a9beb5c7d51b43785df232a3a3c40
          Size/MD5:     8560 2bb181fcf769aafd08d26aa531bb24a4

  i386 architecture (x86 compatible Intel/AMD):

          Size/MD5:     9104 0a0a8a786ad29625fe5aa3de79c5cd98
          Size/MD5:  2592100 3023e22d5e6b3ff51fcf3641cd039e93
          Size/MD5:   558556 5d369da01ec40b1d79b7e015d9982302
          Size/MD5: 13984728 5464f6de725b919cdb4bd7252d221016
          Size/MD5:     8562 3e34c884aff529f95a2975cdb08b2723

  lpia architecture (Low Power Intel Architecture):

          Size/MD5:     9104 156a8ede19f2d65929e73f119415f1b7
          Size/MD5:  2621316 02b4e9168fdacc9ab8955de557c64a7d
          Size/MD5:   578522 eb5a953dc2d59c2893656467bc879c25
          Size/MD5: 14110238 ee2d23ca2c7d25f37e5cb4d315730ad4
          Size/MD5:     8560 7c2df17d8e67444172c9093c28a01d71