{"id":"CVE-2026-48756","title":"Incus is a system container and virtual machine manager","summary":"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…","severity":"low","cwe":["CWE-476"],"vendor":"lxc","product":"github.com/lxc/incus/v7/cmd/incusd","affected":["github.com/lxc/incus/v7/cmd/incusd < 7.1.0"],"patched":["github.com/lxc/incus/v7/cmd/incusd 7.1.0"],"published":"2026-08-21","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:09:01.757","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-48756","references":[{"url":"https://github.com/lxc/incus/security/advisories/GHSA-xhqx-mgh3-3h7q","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-xhqx-mgh3-3h7q"}],"tags":["nvd","ghsa","go"],"epss":0.00226,"epssPercentile":0.13557,"ecosystem":"go","ingestedAt":"2026-06-29T13:24:35.284Z","slug":"CVE-2026-48756","body":"## Overview\n\nIncus 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-48756)\n\nAffected packages:\n\n- `github.com/lxc/incus/v7/cmd/incusd < 7.1.0`\n\nPatched in:\n\n- `github.com/lxc/incus/v7/cmd/incusd 7.1.0`\n\nSource: https://github.com/advisories/GHSA-xhqx-mgh3-3h7q","depth":"sunlit","depthScore":14,"depthScoreParts":{"impact":13.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}