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EulerOS 2.0 SP12 : libxml2 (EulerOS-SA-2026-3356)

high Nessus Plugin ID 343659

Synopsis

The remote EulerOS host is missing multiple security updates.

Description

According to the versions of the libxml2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

 Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.(CVE-2026-6653)

 libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in
 --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.
 By supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.
 Successful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.

 This issue has been fixed in the commit c2e233fc.

 NOTE:
 The maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.(CVE-2026-11979)

Tenable has extracted the preceding description block directly from the EulerOS libxml2 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 affected libxml2 packages.

See Also

http://www.nessus.org/u?17eb4121

Plugin Details

Severity: High

ID: 343659

File Name: EulerOS_SA-2026-3356.nasl

Version: 1.1

Type: Local

Published: 9/8/2026

Updated: 9/8/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.44

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-6653

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 v4

Risk Factor: High

Base Score: 8.3

Threat Score: 7

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: cpe:/o:huawei:euleros:2.0, p-cpe:/a:huawei:euleros:libxml2-devel, p-cpe:/a:huawei:euleros:libxml2-help, p-cpe:/a:huawei:euleros:libxml2, p-cpe:/a:huawei:euleros:python3-libxml2

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

Excluded KB Items: Host/EulerOS/uvp_version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/8/2026

Vulnerability Publication Date: 6/4/2026

Reference Information

CVE: CVE-2026-11979, CVE-2026-6653

IAVA: 2026-A-0532