{"id":"DEBIAN-CVE-2026-48756","details":"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.","modified":"2026-09-19T22:47:25.171439543Z","published":"2026-08-21T15:16:41.210Z","upstream":["CVE-2026-48756"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-48756"}],"affected":[{"package":{"name":"incus","ecosystem":"Debian:13","purl":"pkg:deb/debian/incus?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.4-2+deb13u8"}]}],"versions":["6.0.4-2","6.0.4-2+deb13u1","6.0.4-2+deb13u1~bpo12+1","6.0.4-2+deb13u2","6.0.4-2+deb13u2~bpo12+1","6.0.4-2+deb13u3","6.0.4-2+deb13u3~bpo12+1","6.0.4-2+deb13u4","6.0.4-2+deb13u4~bpo12+1","6.0.4-2+deb13u5","6.0.4-2+deb13u5~bpo12+1","6.0.4-2+deb13u6","6.0.4-2+deb13u6~bpo12+1","6.0.4-2+deb13u7","6.0.4-2+deb13u7~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48756.json"}},{"package":{"name":"incus","ecosystem":"Debian:14","purl":"pkg:deb/debian/incus?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.0-2"}]}],"versions":["6.0.4-2","6.0.4-3","6.0.5-1","6.0.5-2","6.0.5-3","6.0.5-4","6.0.5-5","6.0.5-6","6.0.5-7","6.0.5-8","6.0.6-1","6.0.6-2","6.0.6-3","6.14.0-1~exp1","6.15.0-1~exp1","6.16.0-1~exp1","6.17.0-1~exp1","6.20.0-1~exp1","6.21.0-1~exp1","6.22.0-1~exp1","6.23.0-1~exp1","7.0.0-1","7.0.0-1~bpo13+1","7.0.0-2~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48756.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/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"}]}