Out-of-bounds read in Rsync - CVE-2026-43620
Published: June 1, 2026
Vulnerability identifier: #VU133148
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-43620
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Samba
Affected software:
Rsync
Rsync
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in recv_files() when processing a crafted file list and transfer record from a malicious server. A remote attacker can send a crafted file list and transfer record to cause a denial of service.
The issue is reachable by any client pulling from a malicious server, and no special options are required on the victim because inc_recurse is the protocol-30+ default.
How to mitigate CVE-2026-43620
Install security update from vendor's website.