CVE-2026-119741

High

Description

rsync before 3.5.2 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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductSamba Rsync

PublishedNov 3, 2026

First seenNov 4, 2026

Weakness typeCWE-407CWE-407

How to fix

Patches

github.com/RsyncProject/rsync/pull/1132
github.com/RsyncProject/rsync/commit/a7404a9a633cff28ee1602f328b9c3fa69cdbd04

Affected products

Product	Affected versions	Fixed in
samba rsync	v ≤ 3.5.1	—

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