PT-2025-45506 · Libxml2+1 · Libxml2+1

Published 2025-11-07 · Updated 2026-04-16 · CVE-2025-12863

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions libxml2 (affected versions not specified)

Description A flaw exists in the xmlSetTreeDoc() function of the libxml2 XML parsing library. This function manages document pointers during XML node movements between documents. Improper handling of namespace references can result in a namespace pointer remaining linked to a freed memory region after the original document is destroyed. Subsequent access to this namespace can trigger a use-after-free condition, potentially leading to application crashes.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2025-12863

ECHO-987E-B086-DE53

Affected Products

Debian

Libxml2

References · 17

• https://security-tracker.debian.org/tracker/CVE-2025-12863 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-12863 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-12863 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-12863 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-12863 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2025-12863 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-12863 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2025-12863 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2025-12863 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2413323 · Note
• https://twitter.com/VulmonFeeds/status/1987079561071227144 · Twitter Post
• https://twitter.com/CVEnew/status/1986904923976392954 · Twitter Post
• https://access.redhat.com/security/cve/CVE-2025-12863 · Note
• https://twitter.com/ZeroPathLabs/status/1986912199990747544 · Twitter Post
• https://docs.bell-sw.com/security/cves/CVE-2025-12863 · Note