Authenticated Denial of Service via Malicious Backup Tarball in LXD
Published Jun 26, 2026
6.5
MEDIUMCVSS 3.1
EPSS 0.55%
Description
Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field.
Affected products
-
- Version 5.21.0StatusaffectedConstraints<5.21.5
- Version 6.0StatusaffectedConstraints<6.9
- Version
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
Upgrade to LXD version 5.21.5 or later, or 6.9 or later.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Jun 26, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Jun–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.55% (0.00548) | 43.86th | v5 (v2026.06.15) |
| Jun 27, 2026 | 0.38% (0.00376) | 29.47th | v5 (v2026.06.15) |
References (3)
- https://github.com/canonical/lxd/pull/18320 patchIssue Tracking
- https://github.com/canonical/lxd/pull/18390 patchIssue Tracking
- https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8 exploitvdb-entryvendor-advisoryPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/canonical/lxd/pull/18320 | patchIssue Tracking | |
| https://github.com/canonical/lxd/pull/18390 | patchIssue Tracking | |
| https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8 | exploitvdb-entryvendor-advisoryPatchVendor Advisory |
Change history (0)
No recorded changes yet.