Buffer overflow in the lldp_decode function in daemon/protocols/lldp.c in lldpd before 0.8.0 allows remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via vectors involving large management addresses and TLV boundaries.
https://www.debian.org/security/2021/dsa-4836
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07
https://lists.debian.org/debian-lts-announce/2021/02/msg00032.html
https://github.com/vincentbernat/lldpd/commit/dd4f16e7e816f2165fba76e3d162cd8d2978dcb2
https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf