A gpsd security update has been released for Debian GNU/Linux 9 LTS to address a security vulnerability.

DLA 2795-1: gpsd security update

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Debian LTS Advisory DLA-2795-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Adrian Bunk
October 29, 2021   https://wiki.debian.org/LTS
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Package : gpsd
Version : 3.16-4+deb9u1
CVE ID : CVE-2018-17937
Debian Bug : 925327

A security vulnerability was discovered in gpsd, the Global Positioning
System daemon. A stack-based buffer overflow may allow remote attackers
to execute arbitrary code via traffic on port 2947/TCP or crafted JSON
inputs.

For Debian 9 stretch, this problem has been fixed in version
3.16-4+deb9u1.

We recommend that you upgrade your gpsd packages.

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

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