A libgc security update has been released for Debian GNU/Linux 9 LTS to address integer overflows in multiple places.

DLA 2966-1: libgc security update

- -------------------------------------------------------------------------
Debian LTS Advisory DLA-2966-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Thorsten Alteholz
March 30, 2022   https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : libgc
Version : 1:7.4.2-8+deb9u1
CVE ID : CVE-2016-9427

libgc, a conservative garbage collector, is vulnerable to integer
overflows in multiple places. In some cases, when asked to allocate a huge
quantity of memory, instead of failing the request, it will return a
pointer to a small amount of memory possibly tricking the application into
a buffer overwrite.

For Debian 9 stretch, this problem has been fixed in version
1:7.4.2-8+deb9u1.

We recommend that you upgrade your libgc packages.

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

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