CVE-2026-126900
Description
A flaw was found in chromium-browser's Cascading Style Sheets (CSS) component. A remote attacker could exploit a use-after-free vulnerability by convincing a user to view a specially crafted HTML page. Successful exploitation allows the attacker to execute arbitrary code inside the browser sandbox.
Statement
This vulnerability is rated as Important rather than Critical because successful exploitation requires user interaction to visit a specially crafted web page and execution remains confined within Chromium's renderer sandbox. In Red Hat Enterprise Linux desktop environments, Chromium isolates rendering operations inside restricted multi-process sandboxes, mitigating immediate access to the underlying operating system unless chained with an operating system privilege escalation or container escape flaw.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
If the expired pointer is used in a read operation, an attacker might be able to control data read in by the application.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If the expired pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If the expired pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.
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