openEuler 24.03 LTS update for libxml2



| Updated: 2025-07-11
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2025-49794
CVE-2025-49795
CVE-2025-49796
CWE-ID CWE-416
CWE-476
CWE-843
Exploitation vector Network
Public exploit N/A
Vulnerable software
 openEuler
Operating systems & Components / Operating system

libxml2-help
Operating systems & Components / Operating system package or component

python3-libxml2
Operating systems & Components / Operating system package or component

libxml2-devel
Operating systems & Components / Operating system package or component

libxml2-debugsource
Operating systems & Components / Operating system package or component

libxml2-debuginfo
Operating systems & Components / Operating system package or component

libxml2
Operating systems & Components / Operating system package or component

Vendor openEuler

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU111221

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-49794

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within the xmlSchematronGetNode() function when processing XPath expressions in Schematron schema elements schematron.c. A remote attacker can pass specially crafted XML input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 24.03 LTS

libxml2-help: before 2.11.5-8

python3-libxml2: before 2.11.5-8

libxml2-devel: before 2.11.5-8

libxml2-debugsource: before 2.11.5-8

libxml2-debuginfo: before 2.11.5-8

libxml2: before 2.11.5-8

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2025-1768


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Not qualyfied

EUVDB-ID: #VU111222

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-49795

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

This issue does not qualify for vulnerability definition as it is present in the dev code that was never released outside of the dev tree. 

The original description:

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the xmlSchematronFormatReport() function when processing incorrect XPath expressions in Schematron schema reports. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 24.03 LTS

libxml2-help: before 2.11.5-8

python3-libxml2: before 2.11.5-8

libxml2-devel: before 2.11.5-8

libxml2-debugsource: before 2.11.5-8

libxml2-debuginfo: before 2.11.5-8

libxml2: before 2.11.5-8

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2025-1768


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Type Confusion

EUVDB-ID: #VU111223

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-49796

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a type confusion error within the xmlSchematronFormatReport() function when processing sch:name elements in schematron.c. A remote attacker can pass specially crafted data to the application, trigger a type confusion error and crash the application. 

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 24.03 LTS

libxml2-help: before 2.11.5-8

python3-libxml2: before 2.11.5-8

libxml2-devel: before 2.11.5-8

libxml2-debugsource: before 2.11.5-8

libxml2-debuginfo: before 2.11.5-8

libxml2: before 2.11.5-8

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2025-1768


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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