{"id":"UBUNTU-CVE-2026-48754","details":"Incus is a system container and virtual machine manager. Prior to version 7.1.0, `(*backend).createDependentVolumesFromBackup` in `internal/server/storage/backend.go` contains a cluster of unguarded pointer derefs on every dependent-volume entry's `VolumeSnapshots[i]`, `Volume`, and `Pool` sub-fields. An authenticated user with `can_create_instances` permission on any project can crash the `incusd` daemon by uploading an instance backup tarball whose `dependent_volumes[*]` block contains a nil snapshot pointer (or omits `volume:` / `pool:`). This is a sibling-field variant of the 2026-05-04 batch fix `d768f81c0a1d985f35ae56219519822b080bf5e3` (\"Properly check dependent volumes on import\"). That commit added `if disk == nil` at the top of the outer loop, but did not guard the four sub-pointer fields the loop body dereferences naked. Version 7.1.0 contains an updated patch.","modified":"2026-09-02T19:35:47.006430239Z","published":"2026-08-21T15:16:00Z","upstream":["CVE-2026-48754"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-48754"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-48754"},{"type":"REPORT","url":"https://github.com/lxc/incus/pull/3425"},{"type":"REPORT","url":"https://github.com/lxc/incus/security/advisories/GHSA-4xg6-52mh-fpw8"}],"affected":[{"package":{"name":"incus","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/incus?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4-1ubuntu1","0.5.1-1","0.5.1-3","0.6-1","6.0.0-1","6.0.0-1ubuntu0.1","6.0.0-1ubuntu0.2","6.0.0-1ubuntu0.2+esm1","6.0.0-1ubuntu0.3","6.0.0-1ubuntu0.3+esm1","6.0.0-1ubuntu0.3+esm2","6.0.0-1ubuntu0.3+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-lxc-incus-dev","binary_version":"6.0.0-1ubuntu0.3+esm3"},{"binary_version":"6.0.0-1ubuntu0.3+esm3","binary_name":"incus"},{"binary_name":"incus-agent","binary_version":"6.0.0-1ubuntu0.3+esm3"},{"binary_name":"incus-client","binary_version":"6.0.0-1ubuntu0.3+esm3"},{"binary_name":"incus-migrate","binary_version":"6.0.0-1ubuntu0.3+esm3"},{"binary_name":"incus-tools","binary_version":"6.0.0-1ubuntu0.3+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48754.json"}},{"package":{"name":"incus","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/incus?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.3-4","6.0.4-2"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-lxc-incus-dev","binary_version":"6.0.4-2"},{"binary_version":"6.0.4-2","binary_name":"incus"},{"binary_name":"incus-agent","binary_version":"6.0.4-2"},{"binary_name":"incus-base","binary_version":"6.0.4-2"},{"binary_name":"incus-client","binary_version":"6.0.4-2"},{"binary_name":"incus-extra","binary_version":"6.0.4-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48754.json"}},{"package":{"name":"incus","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/incus?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.4-2","6.0.5-8","6.0.5-8ubuntu0.26.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"6.0.5-8ubuntu0.26.04.1~esm1","binary_name":"golang-github-lxc-incus-dev"},{"binary_name":"incus","binary_version":"6.0.5-8ubuntu0.26.04.1~esm1"},{"binary_version":"6.0.5-8ubuntu0.26.04.1~esm1","binary_name":"incus-agent"},{"binary_version":"6.0.5-8ubuntu0.26.04.1~esm1","binary_name":"incus-base"},{"binary_name":"incus-client","binary_version":"6.0.5-8ubuntu0.26.04.1~esm1"},{"binary_version":"6.0.5-8ubuntu0.26.04.1~esm1","binary_name":"incus-extra"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48754.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}]}