CVE-2026-53794
rsync < 3.5.0 Denial of Service via --max-alloc=0 Logic Error
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
rsync before 3.5.0 contains a logic error in --max-alloc handling that allows a sender or configuration setting --max-alloc=0 to disable allocation sanity checks entirely rather than enforcing a zero-byte cap. Attackers can exploit this flaw to cause the receiver to attempt unbounded memory allocations for file list and data structures, potentially exhausting available memory and causing a denial of service.
| CWE | CWE-1284 |
| Vendor | rsyncproject |
| Product | rsync |
| Published | Aug 13, 2026 |
| Last Updated | Aug 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
RsyncProject / rsync
0 ≤ 3.4.4
References
Credits
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