Descriptionlibexpat through 2.5.0 allows recursive XML Entity Expansion if XML_DTD is undefined at compile time.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1063240

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
expat (PTS)buster2.2.6-2+deb10u4vulnerable
buster (security)2.2.6-2+deb10u7vulnerable
bullseye (security), bullseye2.2.10-2+deb11u5vulnerable
sid, trixie2.6.2-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs

CVE is for fixing billion laughs attacks for users compiling *without* XML_DTD defined,
which is not the case for Debian.

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