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CentOS Linux 8 [TuxCare] Security Update: expat / expat-devel / expat-static Multiple Vulnerabilities (CENTOS-STREAM8:CLSA-2026:1773928447)

critical Nessus Plugin ID 362370

Synopsis

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

Description

The CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS-STREAM8:CLSA-2026:1773928447 advisory.

 - In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
 (CVE-2021-45960)

 - In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize. (CVE-2021-46143)

 - addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22822)

 - build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22823)

 - defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
 (CVE-2022-22824)

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 affected packages based on the guidance in TuxCare advisory CENTOS-STREAM8:CLSA-2026:1773928447.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1773928447

http://www.nessus.org/u?d0562b79

Plugin Details

Severity: Critical

ID: 362370

File Name: tuxcare_centos_8_CLSA-2026-1773928447.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/1/2026

Updated: 10/1/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.98

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 7

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

CVSS Score Source: CVE-2021-45960

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

CVSS Score Source: CVE-2022-25315

Vulnerability Information

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/19/2026

Vulnerability Publication Date: 1/1/2022

Reference Information

CVE: CVE-2021-45960, CVE-2021-46143, CVE-2022-22822, CVE-2022-22823, CVE-2022-22824, CVE-2022-22825, CVE-2022-22826, CVE-2022-22827, CVE-2022-23852, CVE-2022-25235, CVE-2022-25236, CVE-2022-25314, CVE-2022-25315, CVE-2022-40674, CVE-2022-43680, CVE-2026-25210

CLSA: 2026:1773928447