{"id":"CVE-2026-119741","published":"2026-11-03T16:17:21.940","lastModified":"2026-11-03T21:10:39.940","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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-407"],"vendors":["samba"],"products":["rsync"],"references":[{"url":"https://github.com/RsyncProject/rsync","tags":["Product"]},{"url":"https://github.com/RsyncProject/rsync/blob/a7404a9a633cff28ee1602f328b9c3fa69cdbd04/testsuite/hashsearch-collision-skip_test.py","tags":["Patch"]},{"url":"https://github.com/RsyncProject/rsync/commit/a7404a9a633cff28ee1602f328b9c3fa69cdbd04","tags":["Patch"]},{"url":"https://github.com/RsyncProject/rsync/pull/1132","tags":["Issue Tracking","Patch"]},{"url":"https://www.vulncheck.com/advisories/rsync-through-3.5.1-denial-of-service-via-hash-search-checksum-collisions","tags":["Third Party Advisory"]}],"exploitRefs":[{"url":"https://github.com/RsyncProject/rsync","tags":["Product"]},{"url":"https://github.com/RsyncProject/rsync/blob/a7404a9a633cff28ee1602f328b9c3fa69cdbd04/testsuite/hashsearch-collision-skip_test.py","tags":["Patch"]},{"url":"https://github.com/RsyncProject/rsync/commit/a7404a9a633cff28ee1602f328b9c3fa69cdbd04","tags":["Patch"]},{"url":"https://github.com/RsyncProject/rsync/pull/1132","tags":["Issue Tracking","Patch"]}],"hasPoc":true,"ai":null}