Integer overflow in Rsync - CVE-2026-43618

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Main Vulnerability Database Vulnerabilities #VU133146

Integer overflow in Rsync - CVE-2026-43618

Published: June 1, 2026


Vulnerability identifier: #VU133146
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43618
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to an integer overflow in the compressed-token decoder when processing compressed token data from an authenticated daemon connection. A remote user can send crafted compressed-token data to disclose sensitive information.

The disclosed memory may include environment variables, passwords, heap data, and library pointers.


Affected software

Rsync
Debian Linux
SUSE Linux Enterprise Server 12 SP5
Gentoo Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Micro
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Ubuntu
Basesystem Module
openSUSE Leap
openEuler
Fedora
LANTIME Operating System Firmware (LTOS)
rsync (Ubuntu package)
rsync-debuginfo
rsync-debugsource
rsync
rsync-help
rsync-doc
rsync-daemon
rsync (Red Hat package)
rsync (Debian package)
net-misc/rsync

How to mitigate CVE-2026-43618

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 3.1.3-3.43.1, 3.2.3-150400.3.31.1, 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 3.1.3-3.43.1, 3.2.3-150400.3.31.1, 3.2.7-7.1, 3.2.7-150600.3.21.1, 3.3.0-slfo.1.1_6.1
rsync - addressed in versions 3.1.3-3.43.1, 3.2.3-150400.3.31.1, 3.2.7-7.1, 3.2.7-150600.3.21.1, 3.3.0-slfo.1.1_6.1
rsync - addressed in versions 3.1.3-14, 3.2.5-8, 3.2.7-10
rsync-debuginfo - addressed in versions 3.1.3-14, 3.2.5-8, 3.2.7-10
rsync-help - addressed in versions 3.1.3-14, 3.2.5-8, 3.2.7-10
rsync-debugsource - addressed in versions 3.1.3-14, 3.2.5-8, 3.2.7-10
rsync-doc - update to 3.1.3-27.0.1
rsync - update to 3.1.3-27.0.1
rsync-daemon - update to 3.1.3-27.0.1
rsync (Red Hat package) - addressed in versions 3.2.5-7.el9_8.2, 3.4.4-1.el10_2
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, 3.5.0-1.fc43, 3.5.0-1.fc44

External References

Related Security Bulletins