Link following in Rsync - CVE-2026-43619

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU133147

Link following in Rsync - CVE-2026-43619

Published: June 1, 2026


Vulnerability identifier: #VU133147
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43619
CWE-ID: CWE-59
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to overwrite files and manipulate filesystem objects outside the module.

The vulnerability exists due to symlink race conditions in path-based system calls in daemon mode when handling path-based system calls without chroot. A local user can replace path components with symlinks during filesystem operations to overwrite files and manipulate filesystem objects outside the module.

Only daemon configurations with use chroot = no for a module are vulnerable.


Affected software

Rsync
Debian Linux
Gentoo Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Micro
Ubuntu
Basesystem Module
openSUSE Leap
Fedora
LANTIME Operating System Firmware (LTOS)
rsync (Ubuntu package)
rsync-debuginfo
rsync
rsync-debugsource
rsync (Debian package)
net-misc/rsync

How to mitigate CVE-2026-43619

Install security update from vendor's website.

Rsync - update to 3.4.3
LANTIME Operating System Firmware (LTOS) - update to 7.10.012
rsync (Ubuntu package) - addressed in versions 3.1.0-2ubuntu0.4+esm3, 3.1.0-2ubuntu0.4+esm4, 3.1.1-3ubuntu1.3+esm5, 3.1.1-3ubuntu1.3+esm6, 3.1.2-2.1ubuntu1.6+esm3, 3.1.2-2.1ubuntu1.6+esm4, 3.1.3-8ubuntu0.9+esm1, 3.1.3-8ubuntu0.9+esm2, 3.2.7-0ubuntu0.22.04.6, 3.2.7-0ubuntu0.22.04.7, 3.2.7-1ubuntu1.4, 3.2.7-1ubuntu1.5, 3.4.1+ds1-7ubuntu0.2, 3.4.1+ds1-7ubuntu0.3, 3.4.1+ds1-5ubuntu1.2, 3.4.1+ds1-5ubuntu1.3
rsync-debuginfo - addressed in versions 3.1.3-3.46.1, 3.2.7-7.1, 3.2.7-150600.3.21.1, 3.3.0-slfo.1.1_6.1
rsync - addressed in versions 3.1.3-3.46.1, 3.2.7-7.1, 3.2.7-150600.3.21.1, 3.3.0-slfo.1.1_6.1
rsync-debugsource - addressed in versions 3.1.3-3.46.1, 3.2.7-7.1, 3.2.7-150600.3.21.1, 3.3.0-slfo.1.1_6.1
rsync (Debian package) - addressed in versions 3.2.7-1+deb12u5, 3.4.1+ds1-5+deb13u3
net-misc/rsync - update to 3.4.3
rsync - addressed in versions 3.4.3-1.fc43, 3.4.3-1.fc44, 3.4.4-1.fc43

External References

Related Security Bulletins