CVE-2026-96812

Host Root Sandbox Escape in gVisor via Character Device Passthrough and CUSE

Published Sep 25, 2026 CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
Description
Improper Exposure of Resource to Wrong Sphere in the host file helper (gofer) in Google gVisor prior to commit 573a9e73cf844f on Linux platforms with CUSE enabled allows a local attacker with container image deployment privileges to achieve root code execution on the host system. By including a /dev/cuse character device node in a container image, opening the device passes through to the host, allowing the sandboxed attacker to register a host device and exploit CUSE unrestricted ioctl handling to overwrite root udev helper memory.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Google
Google gvisor
Vendors & Products Google
Google gvisor
Type Values Removed Values Added
Description Improper Exposure of Resource to Wrong Sphere in the host file helper (gofer) in Google gVisor prior to commit 573a9e73cf844f on Linux platforms with CUSE enabled allows a local attacker with container image deployment privileges to achieve root code execution on the host system. By including a /dev/cuse character device node in a container image, opening the device passes through to the host, allowing the sandboxed attacker to register a host device and exploit CUSE unrestricted ioctl handling to overwrite root udev helper memory.
Title Host Root Sandbox Escape in gVisor via Character Device Passthrough and CUSE
Weaknesses CWE-269
CWE-668
References
Metrics cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Google
Published
Updated
Sep 25, 2026, 4:07 PM
Reserved
Sep 23, 2026, 5:12 PM
Status
Awaiting Analysis
Published
Sep 25, 2026, 3:17 PM
Modified
Sep 25, 2026, 5:17 PM