CVE-2026-76781 MEDIUM

CVE-2026-76781: Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-476
Published September 17, 2026
Last update September 18, 2026
View on NVD All CVEs

CVSS base score

5.5/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).

Key dates

02Disclosure timeline

September 17, 2026 CVE published
September 18, 2026 Record updated