CVE-2026-126867
Description
A flaw was found in chromium-browser. A use-after-free memory vulnerability exists in the browser component when handling web content. By convincing a user to visit a specially crafted HTML page, a remote attacker could exploit this issue to escape the browser sandbox and execute arbitrary code on the host system.
Statement
This vulnerability is rated as Important rather than Moderate because successful exploitation could allow an attacker to bypass browser containment mechanisms and run arbitrary instructions on the client operating system. Red Hat environments are primarily exposed when desktop users or workstation installations interact with untrusted web content. Exploitation necessitates user interaction, as a victim must be tricked into viewing a malicious document, preventing automated network-based attacks against non-interactive servers. Furthermore, upstream advisories identify this vulnerability as affecting the Windows platform, which limits its applicability across standard Red Hat enterprise deployments.
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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