Vulnerability details
CVE-2026-96812
Google gVisor
Host Root Sandbox Escape in gVisor via Character Device Passthrough and CUSE
CVSS 4.0
8.8High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 4.0 | CVEProject cvelistV5 (CNA) (Google) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| gVisor | v < 573a9e73cf844f | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-09-25
- Last updated
- 2026-09-25
- State
- Published
- Assigner (CNA)
Exploit prediction (EPSS)
0.12%
Probability of exploitation in 30 days
2.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-668Exposure of Resource to Wrong Sphere
- CWE-269Improper Privilege Management