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RHEL 8 : rsync (RHSA-2026:26408)

high Nessus Plugin ID 321261

Synopsis

The remote Red Hat host is missing one or more security updates for rsync.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26408 advisory.

 The rsync utility enables the users to copy and synchronize files locally or across a network.
 Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool.

 Security Fix(es):

 * rsync: rsync: Remote memory disclosure via integer overflow in compressed-token decoding (CVE-2026-43618)

 * rsync: TOCTOU symlink race condition allowing local privilege escalation in daemon mode without chroot.
 (CVE-2026-29518)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL rsync package based on the guidance in RHSA-2026:26408.

See Also

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2469054

https://bugzilla.redhat.com/show_bug.cgi?id=2469055

http://www.nessus.org/u?7e82e410

https://access.redhat.com/errata/RHSA-2026:26408

Plugin Details

Severity: High

ID: 321261

File Name: redhat-RHSA-2026-26408.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/16/2026

Updated: 6/16/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:C

CVSS Score Source: CVE-2026-43618

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.3

Threat Score: 4.4

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-29518

Vulnerability Information

CPE: cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:rsync, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:rsync-daemon

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 6/16/2026

Vulnerability Publication Date: 5/20/2026

Reference Information

CVE: CVE-2026-29518, CVE-2026-43618

CWE: 190, 367

RHSA: 2026:26408