This bug is awaiting verification that the linux-gke/5.4.0-1061.64
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-focal' to 'verification-done-focal'. If the
problem still exists, change the tag 'verification-needed-focal' to
'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-focal

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https://bugs.launchpad.net/bugs/1959173

Title:
  Vulnerability in af_packet handling

Status in linux-gke package in Ubuntu:
  Invalid
Status in linux-gke source package in Focal:
  In Progress

Bug description:
  CVE-2021-22600

  A vulnerability, which was classified as critical, was found in Linux
  Kernel. Affected is the function packet_set_ring of the file
  net/packet/af_packet.c. The manipulation with an unknown input leads
  to a memory corruption vulnerability. This is going to have an impact
  on confidentiality, integrity, and availability.

  The weakness was released 01/26/2022. The advisory is shared for
  download at git.kernel.org. This vulnerability is traded as
  CVE-2021-22600 since 01/05/2021. The exploitability is told to be
  easy. It is possible to launch the attack remotely. A authentication
  is required for exploitation. There are known technical details, but
  no exploit is available. The current price for an exploit might be
  approx. USD $5k-$25k (estimation calculated on 01/26/2022).

  Applying a patch is able to eliminate this problem. The fix is
  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=ec6af094ea28f0f2dda1a6a33b14cd57e36a9755

  More information at:
  https://partnerissuetracker.corp.google.com/issues/215427453

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