VDB-312377 · CVE-2025-49796 · EUVD-2025-18415

libxml type confusion

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.7	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in libxml. Affected is an unknown function. The manipulation leads to type confusion. This vulnerability is uniquely identified as CVE-2025-49796. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in libxml (affected version not known) and classified as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a type confusion vulnerability. Using CWE to declare the problem leads to CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. Impacted is availability. The summary by CVE is:

A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.

The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2025-49796 since 06/10/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/29/2025).

The vulnerability scanner Nessus provides a plugin with the ID 241659 (RHEL 8 : libxml2 (RHSA-2025:10698)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (241659), EUVD (EUVD-2025-18415) and CERT Bund (WID-SEC-2025-1312). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

IBM VIOS
IBM AIX
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
Open Source Arch Linux
IBM Power Hardware Management Console
Red Hat OpenShift
SUSE openSUSE
Hitachi Energy RTU500
IBM MQ
NetApp Data ONTAP
IBM TXSeries
Open Source libxml2
Tenable Security Nessus
IBM App Connect Enterprise
RealObjects PDFreactor
Open Source Fluentd

Productinfo

Name

libxml

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.7

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 9.1
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Type confusion
CWE: CWE-843
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 241659
Nessus Name: RHEL 8 : libxml2 (RHSA-2025:10698)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/10/2025 🔍
06/12/2025 +2 days 🔍
06/12/2025 +0 days 🔍
10/29/2025 +139 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2025-49796 (🔍)
GCVE (CVE): GCVE-0-2025-49796
GCVE (VulDB): GCVE-100-312377
EUVD: 🔍
CERT Bund: WID-SEC-2025-1312 - libxml2: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 06/12/2025 08:54
Updated: 10/29/2025 12:40
Changes: 06/12/2025 08:54 (48), 06/16/2025 19:35 (1), 07/09/2025 14:27 (13), 07/10/2025 09:14 (2), 08/09/2025 17:09 (7), 09/14/2025 06:07 (1), 10/29/2025 12:40 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.