8.7
High
CVE-2026-119741 rsync < 3.5.2 Denial of Service via hash_search() Checksum Collisions
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.
CVSS 4.0 detail
Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NExploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- Interaction
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- High
- Confidentiality of other systems
- None
- Integrity of other systems
- None
- Availability of other systems
- None
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| rsync 3.5 | earliest → 3.5.1 | 3.5.2 |
References
- Fixed Release Tag github.com
- Pull Request #1132 github.com
- Patch Commit github.com
- github.com github.com
- VulnCheck Advisory: rsync through 3.5.1 Denial of Service via hash_search() Checksum Collisions www.vulncheck.com
Timeline
- Published
- Last modified
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