CVE-2026-2313: 
vulnerability analysis and mitigation

CVE-2026-2313 is a use-after-free vulnerability in the CSS processing component of Google Chrome, classified as High severity. It affects all versions of Google Chrome prior to 145.0.7632.45 on Windows, Mac, and Linux, as well as Microsoft Edge (Chromium-based). The vulnerability was reported by Han Zheng (HexHive), Wenhao Fang (University of St. Andrews), and Qinying Wang (HexHive) on 2025-12-09, and patched on February 10, 2026 with the Chrome 145 stable channel release. It carries a CVSS v3.1 base score of 8.8 (High) (Chrome Release, Microsoft MSRC).

The vulnerability is classified as CWE-416 (Use After Free), occurring within Chrome's CSS processing engine. A use-after-free condition arises when memory that has been freed is subsequently accessed, potentially allowing an attacker to control the contents of that memory region and redirect program execution. Exploitation requires a victim to visit a specially crafted HTML page, which triggers the CSS parsing logic to access freed heap memory, potentially leading to heap corruption. No public proof-of-concept or detailed technical write-up has been disclosed as of the time of reporting (Chrome Release, Feedly).

Successful exploitation of CVE-2026-2313 could allow a remote attacker to achieve arbitrary code execution with the privileges of the user running Chrome, by inducing heap corruption through a malicious HTML page. This could result in high confidentiality, integrity, and availability impacts — including theft of sensitive browser data (cookies, credentials, saved passwords), installation of malware, or full compromise of the affected user's session. The vulnerability affects all major desktop platforms (Windows, Mac, Linux) and Chromium-based Microsoft Edge, broadening the potential attack surface (Chrome Release, Feedly).

1. Reconnaissance: Identify targets running Google Chrome versions prior to 145.0.7632.45 or unpatched Chromium-based browsers (e.g., Microsoft Edge) using passive fingerprinting or social engineering.
2. Craft malicious HTML page: Develop a specially crafted HTML page that triggers a use-after-free condition in Chrome's CSS processing engine — for example, by manipulating CSS object lifecycles to cause a freed memory region to be accessed.
3. Deliver the payload: Host the malicious page on an attacker-controlled server and lure the victim to visit it via phishing email, malicious advertisement, or compromised website.
4. Trigger heap corruption: When the victim loads the page in a vulnerable Chrome instance, the CSS engine accesses freed memory, causing heap corruption.
5. Achieve code execution: Leverage the heap corruption to redirect execution flow, potentially achieving arbitrary code execution with the privileges of the Chrome renderer process, enabling data theft, malware installation, or sandbox escape attempts (Chrome Release).

• Network: Unexpected outbound connections from the browser process to unknown external IPs following visits to unfamiliar or suspicious websites; DNS queries to newly registered or low-reputation domains.
• Process: Unusual child processes spawned by the Chrome renderer process (e.g., cmd.exe, powershell.exe, bash, curl, wget); Chrome processes exhibiting abnormal CPU or memory usage.
• File System: Unexpected files written to user temp directories or Chrome profile directories; new executables or scripts created by the Chrome process.
• Logs: Browser crash reports or minidumps generated around the time of suspicious page visits; system event logs showing process creation anomalies originating from Chrome.

Google has released Chrome 145.0.7632.45 (Linux) and 145.0.7632.45/46 (Windows/Mac) to address this vulnerability; users should update immediately via Chrome's built-in update mechanism or by downloading from the official Chrome website. Microsoft has also released a corresponding update for Microsoft Edge (Chromium-based), tracked under the same CVE. As a temporary workaround, organizations can restrict access to untrusted or unknown websites via browser policy and educate users to avoid clicking suspicious links. Downstream distributions (Debian, Fedora, openSUSE) have also released updated Chromium packages (Chrome Release, Microsoft MSRC).

The Chrome 145 security update received broad coverage from security news outlets including GBHackers, CyberSecurityNews, SecurityOnline, and CyberPress, which highlighted the three High-severity fixes (CVE-2026-2313, CVE-2026-2314, CVE-2026-2315) as notable for their potential code execution impact. Check Point Research included the vulnerability in their February 16, 2026 weekly threat intelligence report. Community discussion on Reddit (r/pwnhub) noted the patch as part of Chrome 145's 11-vulnerability fix batch. The $8,000 bug bounty awarded to the HexHive/University of St. Andrews research team was noted as reflecting the vulnerability's assessed severity (Chrome Release, SecurityOnline).