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CentOS Linux 7 [TuxCare] Security Update: freerdp / freerdp-devel / freerdp-libs / libwinpr / libwinpr-devel (CENTOS7:CLSA-2026:1771407667)

high Nessus Plugin ID 353153

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Synopsis

The CentOS Linux host is missing one or more security updates.

Description

The CentOS Linux 7 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS7:CLSA-2026:1771407667 advisory.

 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race in the serial channel IRP thread tracking allows a heap useafterfree when one thread removes an entry from serial->IrpThreads while another reads it. This vulnerability is fixed in 3.20.1. (CVE-2026-22856)

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

Solution

Update the affected packages based on the guidance in TuxCare advisory CENTOS7:CLSA-2026:1771407667.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1771407667

http://www.nessus.org/u?9fdd1db9

Plugin Details

Severity: High

ID: 353153

File Name: tuxcare_centos_7_CLSA-2026-1771407667.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/30/2026

Updated: 9/30/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.49

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 6

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

CVSS Score Source: CVE-2026-22856

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

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:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.7

Threat Score: 6.8

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

Required KB Items: Host/OS/extended-third-party, Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/18/2026

Vulnerability Publication Date: 1/14/2026

Reference Information

CVE: CVE-2026-22856

CLSA: 2026:1771407667