CVE-2026-53803

NameCVE-2026-53803
Descriptionrsync before 3.5.0 contains a symlink following vulnerability that allows local attackers to overwrite arbitrary files by placing a symlink at a predictable output path such as --log-file, --write-batch, or daemon-mode log and statistics paths. Attackers can exploit rsync's failure to reject symlinks during ancillary file writes to redirect output to arbitrary filesystem locations, achieving local privilege escalation on installations where rsync runs with elevated privileges such as setuid or privileged daemon configurations.
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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