Libxml: null pointer dereference leads to denial of service (dos)

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Summary

CVECVE-2025-49795
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-06-16 16:15:19 UTC
Updated2026-04-19 20:16:21 UTC
DescriptionA NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This flaw allows an attacker to craft a malicious XML input to libxml2, leading to a denial of service.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.005660000 probability, percentile 0.684980000 (date 2026-04-19)

Problem Types: CWE-825 | CWE-825 Expired Pointer Dereference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 10 unaffected 0:2.12.5-7.el10_0 * rpm Not specified
CNA Red Hat Red Hat JBoss Core Services 2.4.62.SP2 Not specified Not specified
CNA Red Hat Red Hat Hardened Images unaffected 2.15.2-0.3.hum1 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2026:7519 [email protected] access.redhat.com
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
access.redhat.com/security/cve/CVE-2025-49795 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2025:10630 [email protected] access.redhat.com
gitlab.gnome.org/GNOME/libxml2/-/issues/932 [email protected] gitlab.gnome.org
access.redhat.com/errata/RHSA-2025:19020 [email protected] access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2025-06-12T00:31:08.194ZReported to Red Hat.
CNA2025-06-11T00:00:00.000ZMade public.

Workarounds

CNA: Mitigation is either unavailable or does not meet Red Hat Product Security standards for usability, deployment, applicability, or stability.

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