This bug was fixed in the package linux - 5.11.0-13.14

---------------
linux (5.11.0-13.14) hirsute; urgency=medium

  * CVE-2020-27170
    - bpf: Prohibit alu ops for pointer types not defining ptr_limit
    - bpf, selftests: Fix up some test_verifier cases for unprivileged

  * CVE-2020-27171
    - bpf: Fix off-by-one for area size in creating mask to left

 -- Andrea Righi <andrea.ri...@canonical.com>  Fri, 19 Mar 2021 16:49:32
+0100

** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Released

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-27170

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-27171

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https://bugs.launchpad.net/bugs/1918134

Title:
  LRMv4: switch to signing nvidia modules via the Ubuntu Modules signing
  key

Status in linux package in Ubuntu:
  Fix Released
Status in linux-restricted-modules package in Ubuntu:
  Fix Released

Bug description:
  To allow decoupling of nvidia-graphics-drivers-<version> streams and
  versions from the underlying kernel versions we wish to be able to
  sign new kernel modules into an existing kernel after the fact.  Under
  bug #1898716 we added support for an Ubuntu Modules signing key
  certificate.  Rebuild the LRM package to make use of this new
  signature.

  This involves splitting the LRM package into three.  linux-restricted-
  modules first builds the nvidia-graphics-drivers-* we require signed.
  linux-restricted-generate then consumes the .o's produced in that
  build and forms a signing custom binary upload for this.  linux-
  restricted-signatures then consumes the signing result from the LRG
  upload and expresses clean redistributible signatures which are
  consumed by LRM at installation time.  LRG must be embargoed as it
  (necessarily) generates fully formed .ko files for signing.

  Additional process is added to the kernel build life-cycle to handle
  the privacy requirements of the LRG/LRS interaction.

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