A NULL pointer dereference in SANE Backends before 1.0.30 allows a malicious device connected to the same local network as the victim to cause a denial of service, GHSL-2020-079.
https://usn.ubuntu.com/4470-1/
https://securitylab.github.com/advisories/GHSL-2020-075-libsane
https://alioth-lists.debian.net/pipermail/sane-announce/2020/000041.html
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00079.html