SB2026010599 - Ubuntu update for webkit2gtk

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Main Vulnerability Database SB2026010599

SB2026010599 - Ubuntu update for webkit2gtk

Published: January 5, 2026

Security Bulletin ID SB2026010599
Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 25% Low 75%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Buffer overflow (CVE-ID: CVE-2025-66287)

The vulnerability allows a remote attacker to crash the browser.

The vulnerability exists due to a boundary error when HTML content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and crash the browser.


2) Input validation error (CVE-ID: CVE-2025-43458)

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

The vulnerability exists due to insufficient validation of user-supplied input in WebKit. A remote attacker can trick the victim into opening a specially crafted web page and crash the browser.


3) Buffer overflow (CVE-ID: CVE-2025-43421)

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

The vulnerability exists due to a boundary error in WebKit. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and crash the browser.


4) Information disclosure (CVE-ID: CVE-2025-13947)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and exfiltrate system information. 


Remediation

Install update from vendor's website.

References