Detections
Analytics
Amazon Linux 2 : libxml2 (ALAS-2025-2938)
critical Nessus Plugin ID 243257
Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
The version of libxml2 installed on the remote host is prior to 2.9.1-6. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2025-2938 advisory.libxml: Heap use after free (UAF) leads to Denial of service (DoS) (CVE-2025-49794)
libxml: Type confusion leads to Denial of service (DoS) (CVE-2025-49796)
Tenable has extracted the preceding description block directly from the tested product 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
Run 'yum update libxml2' to update your system.See Also
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2025-49794.html
Plugin Details
Severity: Critical
ID: 243257
File Name: al2_ALAS-2025-2938.nasl
Version: 1.1
Type: local
Agent: unix
Published: 7/31/2025
Updated: 7/31/2025
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.0
CVSS v2
Risk Factor: High
Base Score: 9.4
Temporal Score: 7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:C
CVSS Score Source: CVE-2025-49796
CVSS v3
Risk Factor: Critical
Base Score: 9.1
Temporal Score: 7.9
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:libxml2, p-cpe:/a:amazon:linux:libxml2-debuginfo, p-cpe:/a:amazon:linux:libxml2-devel, p-cpe:/a:amazon:linux:libxml2-python, p-cpe:/a:amazon:linux:libxml2-static
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 7/30/2025
Vulnerability Publication Date: 6/16/2025
Reference Information
CVE: CVE-2025-49794, CVE-2025-49796