> CVE-2026-6653 [HIGH]

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PUBLISHED
2026-06-22 14:17
MODIFIED
2026-06-22 14:17
CVSS_SCORE V3
7.0
EPSS (Prob. Exploit)
0.36%
Top 71.9%
DATA SOURCES:
NVD 🔗 2026-06-22 RED HAT 🔗 2026-06-28 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 OSV 🔗 2026-11-02

> DESCRIPTION

Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
Low (L)
Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
Low
Interruption partielle du service possible

> WEAKNESSES

CWE-416 CWE-611

> CWE DETAILED DESCRIPTIONS

CWE-416: Use After Free - The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. | CWE-611: Improper Restriction of XML External Entity Reference - The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: libxml2 security update
An update for libxml2 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (C...
Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage
A Subscription Management tool for finding and reporting Red Hat product usage
Red Hat Security Advisory: Red Hat Update Infrastructure 5.3 security update
The latest release of Red Hat Update Infrastructure. For more details, see the product documentation.
Red Hat Security Advisory: libxml2 security, bug fix, and enhancement update
An update for libxml2 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (C...
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cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.1
cert-manager Operator for Red Hat OpenShift 1.17.1
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: libxml2 security, bug fix, and enhancement update
An update for libxml2 is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vuln...
Red Hat Security Advisory: libxml2 security update
An update for libxml2 is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A C...
Red Hat Security Advisory: libxml2 security update
An update for libxml2 is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A C...
Red Hat Security Advisory: libxml2 security, bug fix, and enhancement update
An update for libxml2 is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On. Red Hat Pro...
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Red Hat AI Base Images 3.5.5 (Neuron) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (Neuron)
Red Hat AI Base Images 3.4.6 (Neuron) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (ROCm 7.14)
Red Hat AI Base Images 3.5.5 (ROCm 7.14) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (Spyre)
Red Hat AI Base Images 3.4.6 (Spyre) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (ROCm 6.4)
Red Hat AI Base Images 3.4.6 (ROCm 6.4) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.0.7 (TPU)
Red Hat AI Base Images 3.0.7 (TPU) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (Spyre)
Red Hat AI Base Images 3.5.5 (Spyre) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (CPU)
Red Hat AI Base Images 3.4.6 (CPU) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (CUDA 13.0)
Red Hat AI Base Images 3.5.5 (CUDA 13.0) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (CUDA 12.9)
Red Hat AI Base Images 3.5.5 (CUDA 12.9) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.0.7 (CUDA)
Red Hat AI Base Images 3.0.7 (CUDA) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (CUDA 13.0)
Red Hat AI Base Images 3.4.6 (CUDA 13.0) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (Gaudi)
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Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (TPU)
Red Hat AI Base Images 3.4.6 (TPU) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.0.7 (CPU)
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Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (Rubin)
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Red Hat Security Advisory: Red Hat AI Base Images 3.0.7 (ROCm)
Red Hat AI Base Images 3.0.7 (ROCm) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (CUDA 12.9)
Red Hat AI Base Images 3.4.6 (CUDA 12.9) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.4.6 (ROCm 7.1)
Red Hat AI Base Images 3.4.6 (ROCm 7.1) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (Gaudi)
Red Hat AI Base Images 3.5.5 (Gaudi) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.0.7 (Spyre)
Red Hat AI Base Images 3.0.7 (Spyre) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (CPU)
Red Hat AI Base Images 3.5.5 (CPU) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.5.5 (TPU)
Red Hat AI Base Images 3.5.5 (TPU) is now available.
Red Hat Security Advisory: libxml2 security, bug fix, and enhancement update
An update for libxml2 is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Security...
Red Hat Security Advisory: libxml2 security, bug fix, and enhancement update
An update for libxml2 is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Pro...
Red Hat Security Advisory: Red Hat AI Base Images 3.4.7 (CUDA 13.0)
Red Hat AI Base Images 3.4.7 (CUDA 13.0) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.0.8 (CPU)
Red Hat AI Base Images 3.0.8 (CPU) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.0.8 (CUDA)
Red Hat AI Base Images 3.0.8 (CUDA) is now available.
Red Hat Security Advisory: Red Hat AI Base Images 3.5.6 (CUDA 12.9)
Red Hat AI Base Images 3.5.6 (CUDA 12.9) is now available.

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Moderate

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

libxml2: Use after free in xmlParseInternalSubset via improper entity resolution handling

AFFECTED PACKAGES:
Unknown / Unknown
5 versions affected

> HISTORIQUE DES MODIFICATIONS

Première apparition
22/06/2026 14:17
Source: NVD
📊 ENRICHISSEMENT 01/07/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-416: Use After Free - The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original p...
📊 ENRICHISSEMENT 28/06/2026 05:02
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Moderate", "severity_scale": null }
📊 ENRICHISSEMENT 28/06/2026 05:02
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 4 months ago

> REFERENCES

https://bugs.launchpad.net/ubuntu/+source/libxml2/+bug/2141260
https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1058
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