rsync 3.5.2 fixes CPU exhaustion flaw
Original title: Open-source file sync tool rsync 3.5.2 fixes a CPU exhaustion flaw
3.5.2 prevents malicious checksum attacks and adds priority controls.
The rsync project released version 3.5.2 to close a CPU exhaustion flaw in hash_search() in match.c. A malicious client can force repeated strong checksum computations on colliding weak checksums. Every version through 3.5.1 is affected when the daemon module is exposed publicly. Version 3.5.2 also adds --nice and --no-nice options to set CPU and I/O scheduling priorities.
Unconfirmed: No public exploitation reported.
- CVE-2026-119741 scores 8.7 on CVSS 4.0
- Affects rsync daemon module
- New priority controls for local and remote processes
Impact: CPU exhaustion on rsync daemon
- 1.Upgrade to rsync 3.5.2
- 2.Avoid exposing public rsync daemon
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-119741 | CPU denial of service in rsync through 3.5.1 | 8.7 | — |
From the original article
2 min read at helpnetsecurity.com
The rsync project released version 3. 5. 2, and it closes a flaw that let a connecting client tie up a server’s CPU with checksum math that leads nowhere.
By Anamarija Pogorelec · helpnetsecurity.com
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