CVE-2026-126889
Description
A flaw was found in the V8 engine of chromium-browser. An off-by-one error allows a remote attacker to potentially execute arbitrary code within the browser sandbox by enticing a user to view a crafted HTML page. This vulnerability compromises the stability and integrity of the browser process within the isolated sandbox environment.
Statement
This vulnerability is rated as an Important severity for Red Hat products because an unauthenticated remote attacker could achieve arbitrary code execution within the browser's sandboxed renderer process when a user visits a maliciously constructed web page. Although the Chromium sandbox prevents direct access to the underlying host operating system without an accompanying sandbox escape, memory corruption inside the V8 engine compromises the integrity and confidentiality of the active browser session. On Red Hat Enterprise Linux, exposure is primarily confined to interactive desktop workstations, while standard server and headless installations without graphical browser usage are not exposed.
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)
Availability
Technical Impact: DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Instability
This weakness will generally lead to undefined behavior and therefore crashes. In the case of overflows involving loop index variables, the likelihood of infinite loops is also high.
Integrity
Technical Impact: Modify Memory
If the value in question is important to data (as opposed to flow), simple data corruption has occurred. Also, if the wrap around results in other conditions such as buffer overflows, further memory corruption may occur.
Confidentiality,Availability,Access Control
Technical Impact: Execute Unauthorized Code or Commands; Bypass Protection Mechanism
This weakness can sometimes trigger buffer overflows which can be used to execute arbitrary code. This is usually outside the scope of a program's implicit security policy.
Frequently Asked Questions
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