CVE-2026-126921
Description
A flaw was found in chromium-browser. A remote attacker can achieve arbitrary code execution inside the browser sandbox by tricking a user into visiting a crafted HTML page. This issue is caused by a use-after-free condition in the Accessibility component, where memory is improperly managed after being released.
Statement
This vulnerability is rated as Important rather than Critical because successful exploitation requires user interaction to navigate to a malicious webpage, and resulting code execution remains confined within the renderer sandbox. Red Hat Enterprise Linux provides chromium-browser for interactive graphical desktop environments, meaning exposure depends on active user browsing activity. Full host compromise is not directly achievable without chaining this flaw with a separate operating system or sandbox escape vulnerability.
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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