CVE-2025-12863
Libxml2: namespace use-after-free in xmlsettreedoc() function of libxml2
Description
Rejected reason: This CVE was assigned for a libxml2 issue#1012 but later deemed not valid. Ref.: https://gitlab.gnome.org/GNOME/libxml2/-/issues/1012#note_2608283
INFO
Published Date :
Nov. 7, 2025, 9:15 p.m.
Last Modified :
Nov. 20, 2025, 3:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-12863
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the libxml2 library to the latest secure version.
- Recompile applications that use the affected libxml2 function.
- Test updated applications for stability and security.
Public PoC/Exploit Available at Github
CVE-2025-12863 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Toolkit for k8s administrators/developers.
Dockerfile Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-12863 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-12863 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Rejected by [email protected]
Nov. 20, 2025
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 20, 2025
Action Type Old Value New Value Changed Description A flaw was found in the xmlSetTreeDoc() function of the libxml2 XML parsing library. This function is responsible for updating document pointers when XML nodes are moved between documents. Due to improper handling of namespace references, a namespace pointer may remain linked to a freed memory region when the original document is destroyed. As a result, subsequent operations that access the namespace can lead to a use-after-free condition, causing an application crash. Rejected reason: This CVE was assigned for a libxml2 issue#1012 but later deemed not valid. Ref.: https://gitlab.gnome.org/GNOME/libxml2/-/issues/1012#note_2608283 Removed CVSS V3.1 Red Hat, Inc.: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Removed CWE Red Hat, Inc.: CWE-416 Removed Reference Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2025-12863 Removed Reference Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2413323 -
New CVE Received by [email protected]
Nov. 07, 2025
Action Type Old Value New Value Added Description A flaw was found in the xmlSetTreeDoc() function of the libxml2 XML parsing library. This function is responsible for updating document pointers when XML nodes are moved between documents. Due to improper handling of namespace references, a namespace pointer may remain linked to a freed memory region when the original document is destroyed. As a result, subsequent operations that access the namespace can lead to a use-after-free condition, causing an application crash. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-416 Added Reference https://access.redhat.com/security/cve/CVE-2025-12863 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2413323