GHSA-56w4-j8c7-xvrwHighCVSS 7.5
rsync through 3.5.1 contains a denial of service vulnerability in the delta-transfer sender's...
🔗 CVE IDs covered (1)
📋 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.
🔗 References (7)
- https://nvd.nist.gov/vuln/detail/CVE-2026-119741
- https://github.com/RsyncProject/rsync/pull/1132
- https://github.com/RsyncProject/rsync/commit/a7404a9a633cff28ee1602f328b9c3fa69cdbd04
- https://github.com/RsyncProject/rsync
- https://github.com/RsyncProject/rsync/blob/a7404a9a633cff28ee1602f328b9c3fa69cdbd04/testsuite/hashsearch-collision-skip_test.py
- https://www.vulncheck.com/advisories/rsync-through-3.5.1-denial-of-service-via-hash-search-checksum-collisions
- https://github.com/advisories/GHSA-56w4-j8c7-xvrw