A buffer overflow vulnerability has been found in lwip, a small independent implementation of the TCP/IPv4/IPv6 protocol suite, which allows an attacker to access information via a crafted ICMPv6 package. This vulnerability has been assigned CVE-2020-22283.
For Debian 10 buster, this problem has been fixed in version 2.0.3-3+deb10u2.
We recommend that you upgrade your lwip packages.
For the detailed security status of lwip please refer to its security tracker page at: https://security-tracker.debian.org/tracker/lwip
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