Improper Validation of Array Index in Rsync - CVE-2026-53792
Published: August 13, 2026
Vulnerability identifier: #VU142287
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-53792
CWE-ID: CWE-129
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper validation of array index in the sender matching logic when processing a receiver-supplied checksum header. A remote attacker can send a checksum header with a non-zero count and zero block length to cause a denial of service.
User interaction is required to initiate the transfer.
Affected software
Rsync
How to mitigate CVE-2026-53792
Install security update from vendor's website.
Rsync - update to 3.5.0