CVE-2025-6021
HIGHlibxml2 - Stack-based Buffer Overflow in xmlBuildQName
Title source: llmDescription
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.
References (28)
Core 28
Core References
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:10630
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:10698
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:10699
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:11580
Vendor Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:11673
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:12098
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:12099
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:12199
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:12237
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:12239
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:12240
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:12241
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:13267
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:13289
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:13325
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:13335
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:13336
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:14059
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:14396
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:15308
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:15672
Vendor Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2025:19020
Vendor Advisory vendor-advisory
x_refsource_redhat
RHSA-2026:7519
https://access.redhat.com/errata/RHSA-2026:7519
Third Party Advisory vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2025-6021
Issue Tracking issue-tracking
x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2372406
Exploit, Issue Tracking, Vendor Advisory
https://gitlab.gnome.org/GNOME/libxml2/-/issues/926
Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-032379.html
Scores
CVSS v3
7.5
EPSS
0.0212
EPSS Percentile
84.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-787
Status
published
Products (50)
Red Hat/Red Hat Discovery 2
sha256:ad07f55ee75fb20310c88f154a04665bd8465d138d66c665c300f61447858344
Red Hat/Red Hat Enterprise Linux 10
0:2.12.5-7.el10_0
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 7 Extended Lifecycle Support
0:2.9.1-6.el7_9.10
Red Hat/Red Hat Enterprise Linux 8
0:2.9.7-21.el8_10.1
Red Hat/Red Hat Enterprise Linux 8.2 Advanced Update Support
0:2.9.7-9.el8_2.3
Red Hat/Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
0:2.9.7-9.el8_4.6
Red Hat/Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
0:2.9.7-9.el8_4.6
Red Hat/Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
0:2.9.7-13.el8_6.10
Red Hat/Red Hat Enterprise Linux 8.6 Telecommunications Update Service
0:2.9.7-13.el8_6.10
... and 40 more
Published
Jun 12, 2025
Tracked Since
Feb 18, 2026