CVE-2026-9639
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.
CSIRTS triage
- What
- Multiple security issues in LXD could allow bypass of security restrictions or execution of arbitrary commands.
- Who is affected
- Deployments of LXD are affected.
- Urgency
- Remediation is necessary due to the potential for serious security breaches.
- Action
- Apply the latest security update for LXD.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all EPSS-scored CVEs.
Advisory coverage (2)
- unknownDSA-6373-1 lxd - security updatedebian · 2026-06-28
- mediumCVE-2026-9639: Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Li…nvd · 2026-06-26
External references
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[](https://www.csirts.com/cve/CVE-2026-9639)