Access of Uninitialized Pointer in Rsync - CVE-2026-70459
Published: August 13, 2026
Vulnerability identifier: #VU142273
CSH Severity: Medium
CVSS v4: 6.9 [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-ID: CVE-2026-70459
CWE-ID: CWE-824
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 access of an uninitialized pointer in recv_file_list() and generate_files() when processing a crafted first incremental file list with a non-directory transfer root. A remote attacker can send a specially crafted file list to cause a denial of service.
The issue affects the per-connection daemon child, and the crash occurs before any transfer phase.
Affected software
Rsync
How to mitigate CVE-2026-70459
Install security update from vendor's website.
Rsync - update to 3.5.0