CVE-2026-126883
Description
A flaw was found in the Core component of Chromium. This issue stems from a use-after-free (UAF) memory corruption vulnerability, where the program attempts to access memory after it has been released. A remote attacker who has compromised the browser renderer process could exploit this flaw via a crafted HTML page to escape the sandbox and execute arbitrary code on the host system.
Statement
Red Hat rates this vulnerability as Important because a sandbox breakout capable of arbitrary host execution presents a severe blast radius. However, exploitation requires notable prerequisites, as an attacker must already control the renderer process through a separate exploit and persuade a victim to navigate to a malicious web page. Furthermore, upstream advisories indicate that this flaw is restricted to the Windows platform, presenting no direct risk to Red Hat Enterprise Linux.
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.
Frequently Asked Questions
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