CVE-2026-119741

Name	CVE-2026-119741
Description	rsync through 3.5.1 contains a denial of service vulnerability in the delta-transfer sender's hash_search() in match.c that allows malicious receivers to trigger unbounded strong-checksum work at consecutive offsets. Unauthenticated attackers pulling from a public daemon module can supply weak checksums colliding with consecutive rolling windows plus non-matching strong checksums, exhausting sender CPU across concurrent connections.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1149604

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rsync (PTS)	bookworm	3.2.7-1+deb12u6	vulnerable
	bookworm (security)	3.2.7-1+deb12u5	vulnerable
	trixie	3.4.1+ds1-5+deb13u4	vulnerable
	trixie (security)	3.5.0+ds1-0+deb13u1	vulnerable
	forky	3.5.1+ds1-2	vulnerable
	sid	3.5.2+ds1-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rsync	source	(unstable)	3.5.2+ds1-1			1149604

Notes

https://github.com/RsyncProject/rsync/issues/1115
https://github.com/RsyncProject/rsync/pull/1132
Fixed by: https://github.com/RsyncProject/rsync/commit/a7404a9a633cff28ee1602f328b9c3fa69cdbd04 (v3.5.2)