CVE-2026-74860

HIGH 8.5

Libxml2: double-free/uaf in libxml2 python bindings

CVSS Score

8.5

EPSS Score

0.7%

EPSS Percentile

51th

A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This triggers a double-free error in the SAX attributeDecl callback handler, where a string is freed twice. This flaw can lead to a denial of service (DoS) due to a reproducible crash in Python applications using the libxml2 SAX bindings.

CWE	CWE-763
Vendor	red hat
Product	red hat enterprise linux 10
Published	Sep 8, 2026
Last Updated	Oct 30, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Red Hat / Red Hat Enterprise Linux 10

All versions affected

Red Hat / Red Hat Enterprise Linux 10.0 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

All versions affected

Red Hat / Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

All versions affected

Red Hat / Red Hat Enterprise Linux 9.6 Extended Update Support

All versions affected

Red Hat / Cert Manager support for Red Hat OpenShift release 1.20

All versions affected

Red Hat / Cert Manager support for Red Hat OpenShift release 1.20

All versions affected

Red Hat / Cert Manager support for Red Hat OpenShift release 1.20

All versions affected

Red Hat / Red Hat Cost Management On-Premise 1

All versions affected

Red Hat / Red Hat Hardened Images

All versions affected

Red Hat / Red Hat OpenShift AI 3.0

All versions affected

Red Hat / Red Hat OpenShift AI 3.0

All versions affected

Red Hat / Red Hat OpenShift AI 3.0

All versions affected

Red Hat / Red Hat OpenShift AI 3.0

All versions affected

Red Hat / Red Hat OpenShift AI 3.0

All versions affected

Red Hat / Red Hat OpenShift AI 3.4

All versions affected

Red Hat / Red Hat OpenShift AI 3.4

All versions affected

Red Hat / Red Hat OpenShift AI 3.4

All versions affected

Red Hat / Red Hat OpenShift AI 3.4

All versions affected

Red Hat / Red Hat OpenShift AI 3.4

All versions affected

Red Hat / Red Hat OpenShift AI 3.4

All versions affected

Red Hat / Red Hat OpenShift AI 3.4

All versions affected

Red Hat / Red Hat OpenShift AI 3.4

All versions affected

Red Hat / Red Hat OpenShift AI 3.4

All versions affected