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CVE-2026-48756

CVE-2026-48756 · Incus: CreateCustomVolumeFromBackup nil-pointer dereference on volume_snapshots[*].expires_at (sibling-field variant of GHSA-r7w7)

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).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.

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:13

    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
    Affected ranges
    • ECOSYSTEM: < 6.0.4-2+deb13u8

    Update to 6.0.4-2+deb13u8

  • 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

  • lxd Ubuntu:Pro:16.04:LTS

    Versions
    • 0.20-0ubuntu4
    • 0.21-0ubuntu3
    • 0.21-0ubuntu5
    • 0.22-0ubuntu1
    • 0.22-0ubuntu2
    • 0.23-0ubuntu1
    • 0.23-0ubuntu2
    • 0.23-0ubuntu3
    • 0.24-0ubuntu2
    • 0.24-0ubuntu3
    • 0.24-0ubuntu4
    • 0.25-0ubuntu1
    • 0.26-0ubuntu2
    • 0.26-0ubuntu3
    • 0.27-0ubuntu1
    • 0.27-0ubuntu2
    • 2.0.0~beta1-0ubuntu3
    • 2.0.0~beta1-0ubuntu4
    • 2.0.0~beta2-0ubuntu1
    • 2.0.0~beta2-0ubuntu2
    • 2.0.0~beta3-0ubuntu1
    • 2.0.0~beta3-0ubuntu2
    • 2.0.0~beta3-0ubuntu3
    • 2.0.0~beta3-0ubuntu4
    • 2.0.0~beta4-0ubuntu1
    • 2.0.0~beta4-0ubuntu2
    • 2.0.0~beta4-0ubuntu3
    • 2.0.0~beta4-0ubuntu4
    • 2.0.0~beta4-0ubuntu5
    • 2.0.0~beta4-0ubuntu6
    • 2.0.0~beta4-0ubuntu7
    • 2.0.0~rc1-0ubuntu1
    • 2.0.0~rc1-0ubuntu2
    • 2.0.0~rc1-0ubuntu3
    • 2.0.0~rc2-0ubuntu2
    • 2.0.0~rc2-0ubuntu3
    • 2.0.0~rc3-0ubuntu1
    • 2.0.0~rc3-0ubuntu2
    • 2.0.0~rc3-0ubuntu3
    • 2.0.0~rc3-0ubuntu4
    • 2.0.0~rc4-0ubuntu1
    • 2.0.0~rc5-0ubuntu1
    • 2.0.0~rc6-0ubuntu1
    • 2.0.0~rc6-0ubuntu2
    • 2.0.0~rc7-0ubuntu1
    • 2.0.0~rc7-0ubuntu2
    • 2.0.0~rc8-0ubuntu1
    • 2.0.0~rc8-0ubuntu2
    • 2.0.0~rc8-0ubuntu3
    • 2.0.0~rc8-0ubuntu5
    • 2.0.0~rc8-0ubuntu6
    • 2.0.0~rc8-0ubuntu7
    • 2.0.0~rc9-0ubuntu2
    • 2.0.0~rc9-0ubuntu3
    • 2.0.0~rc9-0ubuntu4
    • 2.0.0~rc9-0ubuntu5
    • 2.0.0-0ubuntu1
    • 2.0.0-0ubuntu2
    • 2.0.0-0ubuntu3
    • 2.0.0-0ubuntu4
    • 2.0.1-0ubuntu1~16.04.1
    • 2.0.2-0ubuntu1~16.04.1
    • 2.0.3-0ubuntu1~ubuntu16.04.2
    • 2.0.4-0ubuntu1~ubuntu16.04.1
    • 2.0.5-0ubuntu1~ubuntu16.04.1
    • 2.0.8-0ubuntu1~ubuntu16.04.1
    • 2.0.8-0ubuntu1~ubuntu16.04.2
    • 2.0.9-0ubuntu1~16.04.1
    • 2.0.9-0ubuntu1~16.04.2
    • 2.0.10-0ubuntu1~16.04.1
    • 2.0.10-0ubuntu1~16.04.2
    • 2.0.11-0ubuntu1~16.04.2
    • 2.0.11-0ubuntu1~16.04.4
    • 2.0.11-0ubuntu1~16.04.4+esm1
    • 2.0.11-0ubuntu1~16.04.4+esm2
    • 2.0.11-0ubuntu1~16.04.4+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lxd Ubuntu:Pro:18.04:LTS

    Versions
    • 2.18-0ubuntu6
    • 2.19-0ubuntu1
    • 2.20-0ubuntu3
    • 2.20-0ubuntu4
    • 2.21-0ubuntu1
    • 2.21-0ubuntu2
    • 2.21-0ubuntu3
    • 2.21-0ubuntu4
    • 3.0.0~beta2-0ubuntu3
    • 3.0.0~beta3-0ubuntu3
    • 3.0.0~beta5-0ubuntu2
    • 3.0.0~beta7-0ubuntu1
    • 3.0.0-0ubuntu1
    • 3.0.0-0ubuntu2
    • 3.0.0-0ubuntu3
    • 3.0.0-0ubuntu4
    • 3.0.1-0ubuntu1~18.04.1
    • 3.0.2-0ubuntu1~18.04.1
    • 3.0.3-0ubuntu1~18.04.1
    • 3.0.3-0ubuntu1~18.04.2
    • 3.0.3-0ubuntu1~18.04.2+esm1
    • 3.0.3-0ubuntu1~18.04.2+esm2
    • 3.0.3-0ubuntu1~18.04.2+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lxd Ubuntu:20.04:LTS

    Versions
    • 1:0.7
    • 1:0.8
    • 1:0.9
    • 1:0.10
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • 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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