CVE-2026-126864
Description
A flaw was found in the V8 engine in Chromium. This vulnerability allows a remote attacker to achieve arbitrary code execution within the browser sandbox by enticing a victim to visit a specially crafted HTML page. The issue stems from a use-after-free condition, where the application accesses memory after it has been released, resulting in memory corruption.
Statement
Red Hat Product Security rates this vulnerability as Important because an unauthenticated remote attacker could achieve arbitrary code execution inside the renderer process by tricking a user into opening a specially crafted web page. Although exploitation requires client-side user interaction, the remote attack vector and potential for memory corruption elevate the severity above Moderate. In standard Red Hat Enterprise Linux desktop deployments, the damage is constrained by Chromium's internal multi-process sandbox, which restricts access to underlying system resources unless combined with an additional privilege escalation 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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