CVE-2026-9639

Authenticated Denial of Service via Malicious Backup Tarball in LXD

CVSS 6.5 MEDIUMEPSS 0.4%CWE-476

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

26 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

Canonical · LXD

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References

https://github.com/canonical/lxd/pull/18320 https://github.com/canonical/lxd/pull/18390 https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8