dnsmasq is vulnerable to buffer overflow. An attacker may forge malicious DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine.
bugzilla.redhat.com/show_bug.cgi?id=1881875
lists.debian.org/debian-lts-announce/2021/03/msg00027.html
lists.fedoraproject.org/archives/list/[email protected]/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/
lists.fedoraproject.org/archives/list/[email protected]/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/
secdb.alpinelinux.org/v3.12/main.yaml
security.gentoo.org/glsa/202101-17
www.debian.org/security/2021/dsa-4844
www.jsof-tech.com/disclosures/dnspooq/