CVE-2026-10898: Chrome GPU Stack Buffer Overflow Sandbox Escape

Technical summary

CVE-2026-10898 is a stack buffer overflow (CWE-121) in Chrome's GPU handling code. The vulnerability requires two preconditions: (1) the attacker must have already compromised the renderer process, and (2) the user must visit or interact with a crafted HTML page. Upon these conditions being met, the overflow allows an attacker to corrupt the stack and redirect execution flow, potentially achieving arbitrary code execution outside the sandbox boundary. The GPU component's lower privilege separation from the OS kernel makes it an attractive target for sandbox escape chains. Google assigned this Chromium security severity: Critical, reflecting the severity of achieving system-level code execution.

Business impact

This vulnerability directly enables privilege escalation attacks in a post-compromise scenario. If an attacker has already gained code execution within Chrome's renderer (via a separate vulnerability or phishing), they can use this GPU overflow to escape the sandbox and execute arbitrary code with the privileges of the logged-in user. This transforms a browser compromise into potential lateral movement, data theft, malware installation, or supply-chain attacks. For enterprises, this means a single browser exploitation could lead to complete endpoint compromise. The user interaction requirement (visiting a crafted page) is the primary barrier, but sophisticated attackers can combine this with spear-phishing or watering-hole attacks.

Affected systems

Google Chrome prior to version 149.0.7827.53 is affected on Windows, macOS, and Linux systems. The vulnerability is specific to the Chrome GPU process and affects all end-user installations of vulnerable Chrome versions across these operating systems. Other Chromium-based browsers (Edge, Opera, Brave, etc.) may also be affected if they use affected Chrome versions or a vulnerable Chromium base; verify with those vendors separately. Notably, this is a Chrome-specific vulnerability and does not affect Firefox, Safari, or other non-Chromium browsers.

Exploitability

Exploitation requires two barriers. First, the attacker must already have compromised the renderer process—this typically requires a separate browser vulnerability or successful social engineering. Second, the victim must open a crafted HTML page while the renderer is compromised. No public exploit has been confirmed in the field. The CVSS score of 8.3 (HIGH) reflects the moderate complexity (AC:H) and the requirement for user interaction (UI:R), balanced against the critical impact once exploited (confidentiality, integrity, and availability all set to high). The vulnerability is not considered widely exploitable in the wild without a complementary renderer vulnerability or chain.

Remediation

Update Google Chrome to version 149.0.7827.53 or later. This version includes a fix for the GPU stack buffer overflow. Chrome auto-updates by default but users should verify they are running the latest version via the version check in Settings > About Chrome (or equivalent on macOS/Linux). For enterprises managing Chrome deployments, push the update through your standard patch management process. No workarounds are available short of disabling GPU acceleration, which is not recommended as it degrades performance significantly and only reduces risk—it does not eliminate it.

Patch guidance

Google Chrome 149.0.7827.53 and later contain the fix. Users on Windows, macOS, and Linux should update immediately. The update is available through Chrome's auto-update mechanism; most users will receive it automatically within 24–48 hours of release. Manually trigger an update by navigating to Settings > About Chrome, which will force a check and update if available. Enterprise administrators should verify patch deployment through their device management solution (e.g., Google Workspace, Intune, or local group policy for Windows). Verify the installed version post-update to confirm the fix is in place.

Detection guidance

Detecting exploitation of this vulnerability in the wild is challenging because it requires a successful renderer compromise followed by GPU process interaction. Endpoint detection and response (EDR) tools should monitor for: (1) Chrome renderer or GPU process crashes followed by unexpected privilege elevation, (2) suspicious GPU memory access patterns or syscalls from the Chrome GPU process, and (3) child processes spawned by Chrome with elevated privileges. Network detection is limited since exploitation occurs within the browser process space; however, detection of the initial renderer compromise (via malicious JavaScript, memory corruption exploits, or suspicious HTML parsing) remains valuable. Behavioral signals such as unexpected process creation or system calls from GPU processes may indicate exploitation attempts.

Why prioritize this

Prioritize this vulnerability for immediate patching despite the CVSS score of 8.3. The reason: (1) sandbox escape vulnerabilities are inherently high-priority because they transform contained browser compromises into full system compromises, (2) GPU component vulnerabilities are increasingly targeted in sophisticated attack chains, (3) the attacker capability requirement (renderer compromise) is met by a large and growing library of other Chrome vulnerabilities and social engineering tactics, and (4) Chrome is ubiquitous in enterprise and consumer environments. This is a classic case where CVSS alone underrepresents the security urgency—context and threat modeling elevate this to critical priority.

Risk score, explained

The CVSS 3.1 score of 8.3 (HIGH) reflects a high-impact but moderate-complexity vulnerability. The score components break down as: Network-based attack vector (AV:N), high attack complexity (AC:H) due to the requirement for an initial renderer compromise, no privileges required (PR:N) for the GPU overflow itself once the renderer is compromised, and user interaction required (UI:R) to visit a crafted page. The impact is high across confidentiality, integrity, and availability (C:H/I:H/A:H), and scope is changed (S:C) because breaking the sandbox affects resources outside the renderer process. While 8.3 sits in the HIGH band, the sandbox-escape nature and likelihood of chaining with other vulnerabilities argues for treating this as critical in operational risk assessments.

Frequently asked questions