CVE-2026-70464

NameCVE-2026-70464
Descriptionrsync daemon 2.0.0 before 3.5.0 contains a denial of service vulnerability that allows unauthenticated remote attackers to exhaust daemon connection slots by stalling the handshake process before or after module selection without triggering the I/O timeout. Attackers can open many simultaneous connections and trickle data at the minimum rate to avoid timeout, or stall entirely before module selection where no timeout applies, consuming all available connection slots and denying service to legitimate clients.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
rsync (PTS)bookworm3.2.7-1+deb12u6vulnerable
bookworm (security)3.2.7-1+deb12u5vulnerable
trixie3.4.1+ds1-5+deb13u4vulnerable
trixie (security)3.4.1+ds1-5+deb13u3vulnerable
forky, sid3.5.0+ds1-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
rsyncsource(unstable)3.5.0+ds1-1

Notes

https://download.samba.org/pub/rsync/NEWS#3.5.0

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