CVE-2026-13831: Google Chrome GPU Sandbox Escape – Out-of-Bounds Memory Vulnerability

Technical summary

CVE-2026-13831 is a use-after-free (CWE-416) vulnerability in the GPU code path of Google Chrome versions prior to 150.0.7871.47. The defect permits out-of-bounds memory reads and writes when processing crafted GPU commands embedded in HTML content. Because the vulnerability requires a compromised renderer process as a starting point, it functions as a sandbox escape mechanism—allowing an attacker to transition from the restricted renderer sandbox to code execution at the GPU process level or higher privilege context. The CVSS 3.1 score of 7.5 (HIGH) reflects high confidentiality and integrity impact with non-trivial attack complexity due to the renderer compromise prerequisite.

Business impact

Organizations relying on Chrome for secure browsing, particularly those handling sensitive content or interacting with untrusted websites, face elevated risk. While the vulnerability requires an initial renderer compromise, successful exploitation enables full code execution, potentially leading to data exfiltration, lateral movement to other systems, or installation of persistent malware. For enterprises with strict security postures, this sandbox escape represents a significant jump in attack capability—transforming a limited renderer-level compromise into a system-level threat.

Affected systems

Google Chrome prior to version 150.0.7871.47 is the primary affected application. The vulnerability's impact spans multiple operating systems—macOS, Linux, and Windows—because Chrome's GPU processing engine is architecture-agnostic. Users on all platforms running vulnerable Chrome versions are exposed. This includes both end-user machines and any systems where Chrome serves as a primary browser or embedded rendering engine.

Exploitability

Exploitation requires two preconditions: (1) an attacker must first compromise the Chrome renderer process, typically via a separate vulnerability or social engineering; and (2) the attacker must serve a specially crafted HTML page to the compromised renderer. The attack is not remotely exploitable in isolation but becomes critical when chained with other Chrome vulnerabilities or as a second-stage payload. The CVSS vector reflects this—'AC:H' (high attack complexity) acknowledges the multi-step nature and the need for user interaction (UI:R) to trigger the initial renderer compromise.

Remediation

Update Google Chrome to version 150.0.7871.47 or later. This version contains patches addressing the out-of-bounds memory access in the GPU code path. Organizations should enforce automated Chrome updates via managed deployment tools (Google Admin Console, MDM solutions, or group policy) to minimize the window of exposure. Verify patch deployment within 72 hours of release for high-risk user populations.

Patch guidance

Patch version 150.0.7871.47 resolves this vulnerability. Deploy via: (1) Automatic updates enabled in Chrome settings (Settings > About > Google Chrome); (2) Managed deployment: Google Admin Console for workspace environments, MDM/EMM platforms for mobile and enterprise devices; (3) Verification: Confirm installed version via chrome://version or about:version in the address bar. For enterprises, test in a non-production environment before staged rollout to ensure compatibility with internal web applications.

Detection guidance

Monitor for Chrome versions below 150.0.7871.47 in your environment using endpoint detection and response (EDR) tools, mobile device management (MDM) platforms, or vulnerability scanning solutions that enumerate installed applications. Look for process execution patterns indicating GPU-level exploitation (unusual GPU driver activity, unexpected privilege escalation events post-Chrome execution). Network detection is limited because payload delivery occurs over encrypted HTTPS; focus on endpoint telemetry. Correlate Chrome crashes or instability with suspicious HTML or ad content users may have visited.

Why prioritize this

This vulnerability merits high-priority patching despite the sandbox-escape prerequisite because: (1) it converts a limited renderer compromise into full code execution; (2) Chrome is ubiquitous in both consumer and enterprise environments; (3) the exploit chain (initial renderer compromise + GPU escape) mirrors real-world attack patterns observed in targeted campaigns; (4) GPU vulnerabilities are historically difficult to patch and often enable persistent exploitation.

Risk score, explained

CVSS 3.1 score of 7.5 (HIGH) is appropriate because: (1) confidentiality, integrity, and availability are all severely impacted upon successful exploitation (C:H, I:H, A:H); (2) the attack vector is network-based (AV:N), allowing remote delivery of malicious content; (3) attack complexity is high (AC:H) due to the renderer compromise requirement; (4) no privileges are required at the network level (PR:N), but local privilege escalation occurs post-compromise; (5) user interaction is required (UI:R) to trigger the initial compromise. The score reflects a serious but not CRITICAL vulnerability because exploitation is not fully remote or one-shot.

Frequently asked questions