{"id":"CVE-2026-96812","aliases":["DEBIAN-CVE-2026-96812","EUVD-2026-87111","GHSA-3chr-j932-q9pc"],"status":"published","title":"Host Root Sandbox Escape in gVisor via Character Device Passthrough and CUSE","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.","severity":{"version":"4.0","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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00127,"percentile":0.02412,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-269","CWE-668"],"published":"2026-09-25T14:47:47Z","modified":"2026-11-07T06:00:10Z","fixes":[{"ecosystem":"Debian:14","package":"golang-gvisor-gvisor","fixed_in":["0.0~20261026.0-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"golang-gvisor-gvisor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0~20221219.0-2","0.0~20230807.0-1","0.0~20230807.0-2","0.0~20230807.0-3","0.0~20230807.0-4","0.0~20230807.0-4~bpo12+1","0.0~20230807.0-5","0.0~20240729.0-1","0.0~20240729.0-2","0.0~20240729.0-3","0.0~20240729.0-4","0.0~20240729.0-4~bpo12+1","0.0~20240729.0-4~bpo12+2","0.0~20240729.0-5","0.0~20240729.0-6","0.0~20240729.0-7","0.0~20261026.0-1","0.0~20261026.0-2","0.0~20261026.0-3"]},{"source":"osv","ecosystem":"Debian:13","package":"golang-gvisor-gvisor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0~20240729.0-4","0.0~20240729.0-5","0.0~20240729.0-6","0.0~20240729.0-7","0.0~20261026.0-1","0.0~20261026.0-2","0.0~20261026.0-3"]},{"source":"osv","ecosystem":"Debian:14","package":"golang-gvisor-gvisor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0~20261026.0-1"}]}],"versions":["0.0~20240729.0-4","0.0~20240729.0-5","0.0~20240729.0-6","0.0~20240729.0-7"]}],"products":[{"vendor":"google","product":"gvisor"}],"references":[{"url":"https://github.com/google/gvisor/commit/573a9e73cf844f","tags":["fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-96812","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-3chr-j932-q9pc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96812.json","tags":["advisory"]},{"url":"https://github.com/google/gvisor","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-96812","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-96812","title":"Host Root Sandbox Escape in gVisor via Character Device Passthrough and CUSE","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.","status":"published","published":"2026-09-25T14:47:47.41Z","modified":"2026-09-25T16:07:52.56Z","cvss":[{"version":"4.0","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","level":"high","assessor":"cna"}],"cwes":["CWE-668","CWE-269"],"updated_at":"2026-11-02T14:20:00.511569Z"}],"euvd":[{"id":"EUVD-2026-87111","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.","status":"published","published":"2026-09-25T14:47:47Z","modified":"2026-09-25T16:07:52Z","cvss":[{"version":"4.0","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","level":"high"}],"updated_at":"2026-11-02T17:27:55.413842Z"}],"ghsa":[{"id":"GHSA-3chr-j932-q9pc","title":"Improper Exposure of Resource to Wrong Sphere in the host file helper (gofer) in Google gVisor...","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.","status":"published","published":"2026-09-25T15:31:50Z","modified":"2026-09-25T15:31:54Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:12:27.190195Z"}],"nvd":[{"id":"CVE-2026-96812","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.","status":"published","published":"2026-09-25T15:17:57.097Z","modified":"2026-09-25T17:17:20.543Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-269","CWE-668"],"updated_at":"2026-11-02T14:12:51.721923Z"}],"osv":[{"id":"CVE-2026-96812","title":"Host Root Sandbox Escape in gVisor via Character Device Passthrough and CUSE","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.","status":"published","published":"2026-09-25T14:47:47.41Z","modified":"2026-10-28T02:30:40.015626046Z","cvss":[{"version":"4.0","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","level":"high"}],"cwes":["CWE-269","CWE-668"],"updated_at":"2026-11-02T15:45:21.262447Z"},{"id":"DEBIAN-CVE-2026-96812","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.","status":"published","published":"2026-09-25T15:17:57.097Z","modified":"2026-11-07T06:00:10.495838728Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-07T06:09:50.435672Z"}]}}