CVE-2025-6021

7.5 HIGH
Published: June 12, 2025 Modified: November 29, 2025

Description

A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:10630
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:10698
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:10699
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:11580
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:12098
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:12099
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:12199
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:12237
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:12239
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:12240
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:12241
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:13267
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:13289
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:13325
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:13335
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:13336
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:14059
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:14396
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:15308
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/errata/RHSA-2025:15672
Source: secalert@redhat.com
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2025-6021
Source: secalert@redhat.com
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2372406
Source: secalert@redhat.com
Issue Tracking
https://gitlab.gnome.org/GNOME/libxml2/-/issues/926
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Issue Tracking Vendor Advisory

26 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.6%
68th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

xmlsoft redhat