DescriptionAn issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1033165

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
dnsmasq (PTS)buster, buster (security)2.80-1+deb10u1vulnerable
sid, trixie, bookworm2.89-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[bookworm] - dnsmasq <no-dsa> (Minor issue)
[bullseye] - dnsmasq <no-dsa> (Minor issue)
[buster] - dnsmasq <no-dsa> (Minor issue);a=commit;h=eb92fb32b746f2104b0f370b5b295bb8dd4bd5e5

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