A gdisk security update has been released for Debian GNU/Linux 9 LTS two address two security issues.

DLA 2549-1: gdisk security update

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Debian LTS Advisory DLA-2549-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Utkarsh Gupta
February 08, 2021   https://wiki.debian.org/LTS
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Package : gdisk
Version : 1.0.1-1+deb9u1
CVE ID : CVE-2020-0256 CVE-2021-0308

CVE-2020-0256

In LoadPartitionTable of gpt.cc, there is a possible
out of bounds write due to a missing bounds check. This
could lead to local escalation of privilege with no
additional execution privileges needed.

CVE-2021-0308

In ReadLogicalParts of basicmbr.cc, there is a possible
out of bounds write due to a missing bounds check. This
could lead to local escalation of privilege with no
additional execution privileges needed.

For Debian 9 stretch, these problems have been fixed in version
1.0.1-1+deb9u1.

We recommend that you upgrade your gdisk packages.

For the detailed security status of gdisk please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/gdisk

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS