{"items":[{"id":"NVI-00018586","kind":"vulnerability","title":"Kata guest escape: runtime-rs guest-root to host-root escape via virtiofs","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-2gv2-cffp-j227","CVE-2026-47243"],"plain_summary":"GitHub lists this reviewed advisory for github.com/kata-containers/kata-containers. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-4055ca095603ddded749474a57287db0"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-4055ca095603ddded749474a57287db0","url":"https://github.com/advisories/GHSA-2gv2-cffp-j227","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-2gv2-cffp-j227","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T00:53:22.747Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-4055ca095603ddded749474a57287db0"],"technology":"github.com/kata-containers/kata-containers","known_exclusions":[],"conditions_summary":"### Summary\n\nIn the runtime-rs standalone virtio-fs path, verified here with QEMU (and verified with Cloud Hypervisor too), Kata Containers runs host `virtiofsd` as root with:\n\n```\n--sandbox none --seccomp none\n```\n\nIf an attacker has root-equivalent execution inside the Kata guest VM, they can send raw FUSE requests directly to the host `virtiofsd`. With the tested runtime-rs virtio-fs configuration, a raw `FUSE_SYMLINK` request whose new symlink name is an absolute host path is honored outside the virtio-fs shared directory.\n\nThis lets guest root create host-root owned symlinks in sensitive host paths. The PoC created here will create symlinks in the host `/etc/cron.d` directory, causing host cron to execute a guest-controlled payload as host root.\n\nImpact: guest root can execute code as host root.\n\n### Affected configuration\n\nThe verified host used:\n\n```\n/opt/kata/share/defaults/kata-containers/runtime-rs/configuration-qemu-runtime-rs.toml\n\nrootless = false\nshared_fs = \"virtio-fs\"\nvirtio_fs_daemon = \"/opt/kata/libexec/virtiofsd\"\nhypervisor_name = \"qemu\"\ndebug_console_enabled = false\n```\n\nPinned upstream references, using Kata Containers `main` commit `2ffd1538a296cff93a357bfba0d","public_affected_ranges":["< 0.0.0-20260519062212-ffa59ce3aa78"]}],"null_published_at":"2026-11-07T07:07:39.858Z","source_updated_at":"2026-05-27T22:50:04.000Z","source_disclosed_at":"2026-05-27T22:50:01.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-07T00:53:22.747Z"}],"next_cursor":null,"snapshot_revision":"42594"}