{"id":"CVE-2026-48756","revision":"15ee26c73bbe4089bb7a3e1420a57456","records":[{"revision":"15ee26c73bbe4089bb7a3e1420a57456","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48756","aliases":[],"title":"Incus: CreateCustomVolumeFromBackup nil-pointer dereference on volume_snapshots[*].expires_at (sibling-field variant of GHSA-r7w7)","description":"Incus is a system container and virtual machine manager. Prior to version 7.1.0, `(*backend).CreateCustomVolumeFromBackup` in `internal/server/storage/backend.go` contains an unguarded `*time.Time` dereference on the `ExpiresAt` field of every volume-snapshot entry in an imported custom-volume backup. An authenticated user with `can_create_storage_volumes` permission on any project can crash the `incusd` daemon by uploading a backup tarball whose `volume_snapshots[*].expires_at` field is absent. This is a sibling-field variant of GHSA-r7w7-mmxr-47r9 (CVE-2026-40197). Commit `985a1dedf9f3e7ba729c93b654905ed510de25c2` added `if s == nil` at the top of the loop body, but did not guard the adjacent `*snapshot.ExpiresAt` deref 19 lines later. Every other consumer of `Config.VolumeSnapshots[i].ExpiresAt` in this same file already gates the deref with a nil-check — the asymmetric guard is the bug. Version 7.1.0 contains an updated patch.","state":0,"publishedAt":"2026-08-21T14:10:34.151+00:00","modifiedAt":"2026-08-21T21:44:23.844+00:00","affected":[{"ecosystem":"Vendor product","name":"incus","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"lxc\",\n                    \"product\": \"incus\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 7.1.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":2.1,"severity":"LOW"}],"references":["https://github.com/lxc/incus/security/advisories/GHSA-xhqx-mgh3-3h7q"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48756","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48756","identifiers":["CVE-2026-48756"]},"retained":false,"historicalAffected":[]}],"coverage":[]}