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CVE-2026-48754

CVE-2026-48754 · Incus: Nil-pointer dereference in createDependentVolumesFromBackup on disk.{Volume,VolumeSnapshots,Pool}

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 2.1 · Low · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • incus

    Versions
    • < 7.1.0: Affected

    No fix published

  • incus Debian:14

    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
    Affected ranges
    • ECOSYSTEM: < 7.0.0-2

    Update to 7.0.0-2

  • incus Ubuntu:Pro:24.04:LTS

    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
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • incus Ubuntu:25.10

    Versions
    • 6.0.3-4
    • 6.0.4-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • incus Ubuntu:26.10

    Versions
    • 6.0.5-8
    • 7.0.1-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • incus Ubuntu:Pro:26.04:LTS

    Versions
    • 6.0.4-2
    • 6.0.5-8
    • 6.0.5-8ubuntu0.26.04.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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