{"id":"CVE-2026-96812","summary":"Host Root Sandbox Escape in gVisor via Character Device Passthrough and CUSE","details":"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.","modified":"2026-09-27T03:48:39.699694687Z","published":"2026-09-25T14:47:47.410Z","database_specific":{"cna_assigner":"Google","cwe_ids":["CWE-269","CWE-668"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96812.json","unresolved_ranges":[{"extracted_events":[{"fixed":"573a9e73cf844f"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96812.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96812"},{"type":"FIX","url":"https://github.com/google/gvisor/commit/573a9e73cf844f"},{"type":"PACKAGE","url":"https://github.com/google/gvisor"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/google/gvisor","events":[{"introduced":"0"},{"fixed":"573a9e73cf844f"}],"database_specific":{"source":"REFERENCES"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-96812.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}