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.
Published: 2026-09-25
Score: 8.8 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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History

Fri, 25 Sep 2026 15:00:00 +0000

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'}


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: Google

Published:

Updated: 2026-09-25T16:07:52.560Z

Reserved: 2026-09-23T17:12:31.415Z

Link: CVE-2026-96812

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-25T15:17:57.097

Modified: 2026-09-25T16:08:48.610

Link: CVE-2026-96812

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses