{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-96812", "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778", "state": "PUBLISHED", "assignerShortName": "Google", "dateReserved": "2026-09-23T17:12:31.415Z", "datePublished": "2026-09-25T14:47:47.410Z", "dateUpdated": "2026-09-25T16:07:52.560Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "14ed7db2-1595-443d-9d34-6215bf890778", "shortName": "Google", "dateUpdated": "2026-09-25T14:47:47.410Z" }, "title": "Host Root Sandbox Escape in gVisor via Character Device Passthrough and CUSE", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-668", "description": "CWE-668 Exposure of Resource to Wrong Sphere", "type": "CWE" } ] }, { "descriptions": [ { "lang": "en", "cweId": "CWE-269", "description": "CWE-269 Improper Privilege Management", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-480", "descriptions": [ { "lang": "en", "value": "CAPEC-480 Escaping Virtualization" } ] }, { "capecId": "CAPEC-233", "descriptions": [ { "lang": "en", "value": "CAPEC-233 Privilege Escalation" } ] } ], "affected": [ { "vendor": "Google", "product": "gVisor", "platforms": [ "Linux" ], "repo": "https://github.com/google/gvisor", "versions": [ { "status": "affected", "version": "0", "lessThan": "573a9e73cf844f", "versionType": "git" } ], "defaultStatus": "unaffected" } ], "descriptions": [ { "lang": "en", "value": "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.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "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." } ] } ], "references": [ { "url": "https://github.com/google/gvisor/commit/573a9e73cf844f" } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.8, "vectorString": "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" } } ], "credits": [ { "lang": "en", "value": "Anthropic (using Claude)", "type": "finder" } ], "source": { "discovery": "EXTERNAL" }, "x_generator": { "engine": "Aegis CNA Automation" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-09-25T16:07:43.360610Z", "id": "CVE-2026-96812", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-25T16:07:52.560Z" } } ] } }