CVE-2026-110922: 
Google Chrome vulnerability analysis and mitigation

CVE-2026-110922 is a use-after-free vulnerability in the Prerender component of Google Chrome that allows a remote attacker to execute arbitrary code inside the browser's sandbox via a crafted HTML page. It affects all versions of Google Chrome prior to 155.0.8059.84 on Windows, Mac, and Linux. The vulnerability was reported by researcher Xinyang Ge on 2026-10-02 and publicly disclosed on 2026-10-15 alongside the patched stable channel release. It carries a CVSS v3.1 base score of 8.8 (High), though Google's internal Chromium severity rating is Critical (Chrome Releases, GitHub Advisory).

The root cause is a use-after-free (CWE-416) in Chrome's Prerender subsystem, which speculatively loads and renders pages in the background before a user navigates to them. When memory associated with a prerendered page object is freed but a dangling pointer to that memory is subsequently dereferenced, an attacker can manipulate the freed memory region to redirect execution flow. Exploitation requires a user to visit or be redirected to a malicious HTML page, making user interaction a necessary precondition. No public proof-of-concept or detailed technical write-up has been released as of disclosure, consistent with Google's practice of restricting bug details until most users are patched (Chrome Releases, Red Hat Bugzilla).

Successful exploitation allows a remote attacker to execute arbitrary code within Chrome's sandbox, achieving high impact on confidentiality, integrity, and availability of the browser process. While the sandbox limits direct access to the underlying operating system, sandbox escape chained with this vulnerability could lead to full system compromise. All users running Google Chrome prior to version 155.0.8059.84 on Windows, Mac, and Linux are at risk (Chrome Releases, GitHub Advisory).

As of disclosure, there is no public proof-of-concept exploit and no evidence of in-the-wild exploitation (GitHub Advisory). The EPSS score is 0.0, indicating low current probability of exploitation in the wild. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been reported. Exploitation is not automatable (requires user interaction), but the low attack complexity and lack of required privileges make it a viable target for drive-by download campaigns once technical details become public.

1. Reconnaissance: Identify targets running Google Chrome versions prior to 155.0.8059.84 on Windows, Mac, or Linux — the majority of unpatched desktop Chrome users.
2. Craft malicious HTML page: Develop a specially crafted HTML page that triggers the use-after-free condition in Chrome's Prerender component, manipulating memory allocation timing to control the freed memory region.
3. Deliver 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 redirect.
4. Trigger vulnerability: When the victim opens the page in an unpatched Chrome browser, the Prerender subsystem processes the crafted content, triggering the use-after-free and allowing the attacker to redirect execution to attacker-controlled code.
5. Execute arbitrary code in sandbox: The attacker achieves code execution within Chrome's renderer sandbox, potentially enabling further exploitation (e.g., sandbox escape) for full system access (Chrome Releases, Red Hat Bugzilla).

• Network: Unexpected outbound connections from the Chrome browser process to unknown or suspicious IP addresses following a page visit; 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, /bin/sh, curl, wget); Chrome renderer processes consuming abnormally high memory.
• Logs: Browser crash reports or unexpected termination of Chrome renderer processes; system event logs showing process creation from Chrome's renderer sandbox at unusual times.
• File System: Unexpected files written to temp directories by Chrome renderer processes; new executables or scripts appearing in user-writable directories shortly after browser activity.

Google has released Chrome version 155.0.8059.84 (Linux) and 155.0.8059.84/.85 (Windows/Mac) which addresses this vulnerability. Users should update Chrome immediately via Settings > Help > About Google Chrome, or ensure automatic updates are enabled. As a temporary measure, users should avoid visiting untrusted websites and be cautious of unsolicited links until the update is applied. No configuration-based workaround is available for this vulnerability (Chrome Releases).

The vulnerability was noted in the security community via Mastodon/Infosec.exchange accounts tracking CVE disclosures, and covered by security news outlets including SecurityOnline.info and ChromeGeek. Red Hat promptly filed a Bugzilla tracking entry and flagged it as high severity for Chromium-based packages. No major independent researcher commentary or detailed public analysis has been published as of disclosure, consistent with Google's restricted bug disclosure policy (Red Hat Bugzilla, Chrome Releases).