Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Lxd | >= 5.0.0, < 5.21.5 |
| Linux | Linux Kernel | - |
Related Weaknesses (CWE)
References
- https://github.com/canonical/lxd/pull/18320Issue TrackingPatch
- https://github.com/canonical/lxd/pull/18390Issue TrackingPatch
- https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8ExploitPatchVendor Advisory
- https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8ExploitPatchVendor Advisory
FAQ
What is CVE-2026-9639?
CVE-2026-9639 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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...
How severe is CVE-2026-9639?
CVE-2026-9639 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-9639?
Check the references section above for vendor advisories and patch information. Affected products include: Canonical Lxd, Linux Linux Kernel.