SB2026021136 - Ubuntu update for libxmltok 

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Main Vulnerability Database SB2026021136

SB2026021136 - Ubuntu update for libxmltok

Published: February 11, 2026

Security Bulletin ID SB2026021136
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) NULL pointer dereference (CVE-ID: CVE-2026-24515)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in XML_ExternalEntityParserCreate. A remote attacker can pass specially crafted XML data to the application and perform a denial of service (DoS) attack.


2) Integer overflow (CVE-ID: CVE-2026-25210)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow within the doContent() function. A remote attacker can pass specially crafted XML data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install update from vendor's website.

References