External risk intelligence

Google Chrome V8 Heap Corruption Vulnerability.

CVE advisoryKnown Exploit

CVE-2025-5419

A vulnerability in web browsers may allow attackers to corrupt memory via a crafted web page, potentially affecting system data and operations. Organizations should identify and secure affected browsers to mitigate this risk.

4Halo Surface Signal

Out-of-bounds Read

Google Chrome

before 137.0.7151.68before 137.0.3296.62

External exposure likelihood

Halo Surface Signal score for CVE-2025-5419

The vulnerability affects web browsers (Google Chrome and Microsoft Edge) which are client-side applications designed to process and render untrusted content from the public internet. While the attack surface is client-side, the product's primary function is to browse the public web, making it highly likely to encounter and process malicious web-based payloads in common usage.

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability in the V8 component of Google Chrome and Microsoft Edge allows attackers to potentially corrupt memory. This could enable unauthorized actions on affected systems. The flaw is exploitable through crafted web pages.

  • Vulnerable web browser component
  • Memory corruption flaw
  • Potential system compromise

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by directing a user to a malicious web page. The browser's rendering engine, V8, processes a crafted HTML page containing the exploit. This can lead to heap corruption, allowing the attacker to gain control over the affected system. The impact can include unauthorized data access, modification, or system compromise.

  • Exposure via a crafted HTML page.
  • Attacker provides malicious link.
  • Triggering corruption, gaining control.

Live Threat

Current exploitation, exposure, and threat context

The identified vulnerability presents a significant risk due to its potential to cause heap corruption, allowing for the compromise of confidentiality, integrity, and availability of affected systems. Exploitation can occur remotely through a crafted HTML page, posing a threat to organizations whose employees access the internet. The nature of the vulnerability, coupled with its presence on the Known Exploited Vulnerabilities catalog, indicates a need for prompt attention.

  • Attackers require minimal skill.
  • No specific access is needed.
  • Treat as urgent.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

The organization should address a high-severity vulnerability in web browsers that could allow remote attackers to cause heap corruption via a crafted HTML page. This issue presents a significant business risk due to its potential to impact core browsing functionality and data integrity. Prioritized actions focus on identifying and securing affected systems to mitigate potential exploitation.

  • Find exposed browsers.
  • Reduce exposure or isolate risk.
  • Apply, verify, and monitor fixes.

Frequently asked questions

What is the V8 engine and its role in Google Chrome?

The V8 engine is Google's JavaScript and WebAssembly interpreter for Chrome. It processes and executes code, converting it into machine code for speed. V8 is also used in Node.js.

Describe the out-of-bounds read/write vulnerability in CVE-2025-5419.

This vulnerability (CWE-125, CWE-787) occurs when software accesses memory outside its allocated area. In CVE-2025-5419, this flaw in the V8 engine can lead to heap corruption.

How can an attacker exploit CVE-2025-5419?

An attacker can exploit this by tricking a user into visiting a malicious HTML page. The V8 engine processes this page, triggering heap corruption that could allow the attacker to gain control.

What is the relevance of CVE-2025-5419 given its KEV listing?

CVE-2025-5419 is listed on the Known Exploited Vulnerabilities (KEV) catalog, indicating it has been actively exploited. This makes addressing it a priority for organizations.

What actions should be taken to respond to this vulnerability?

Organizations should identify affected Google Chrome and Microsoft Edge browsers and apply the relevant security updates. Isolating vulnerable systems and verifying that patches are correctly installed and monitored are crucial steps.

References