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.
History

Thu, 13 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 13 Aug 2026 15:15:00 +0000

Type Values Removed Values Added
Description 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.
Title rsync < 3.5.0 Denial of Service via --max-alloc=0 Logic Error
Weaknesses CWE-1284
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-13T15:34:33.994Z

Reserved: 2026-06-10T20:14:32.827Z

Link: CVE-2026-53794

cve-icon Vulnrichment

Updated: 2026-08-13T15:34:29.044Z

cve-icon NVD

Status : Received

Published: 2026-08-13T15:19:43.853

Modified: 2026-08-13T16:18:06.893

Link: CVE-2026-53794

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-13T17:00:04Z