CVE-2026-9640Public exploitNetwork attack vector

Host-root escalation via unchecked snapshot restoration

Published Jun 26, 2026 · Updated Jun 26, 2026

Privilege escalation in LXD 5.0.0 through 5.0.6, 5.21.0 through 5.21.4, and 6.0 through 6.8 allows remote authenticated users to gain host root. Snapshot restore copies restricted keys from imported per-snapshot configuration onto the live instance without rerunning project policy validation. Exploitation requires delegated instance creation and edit rights in a restricted project, a crafted backup, snapshot restoration, and instance startup.

CVSS severity7.2
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in LXD 5.0.0 through 5.0.6, 5.21.0 through 5.21.4, and 6.0 through 6.8 allows remote authenticated users to gain host root. Snapshot restore copies restricted keys from imported per-snapshot configuration onto the live instance without rerunning project policy validation. Exploitation requires delegated instance creation and edit rights in a restricted project, a crafted backup, snapshot restoration, and instance startup.

The record

CVE
CVE-2026-9640
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
Canonical
Product
LXD
Classifications
CWE-863, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0.0 <5.0.7
  2. Affected versionversion=5.21.0 <5.21.5
  3. Affected versionversion=6.0 <6.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Canonical · LXDversion=5.0.0 <5.0.7; version=5.21.0 <5.21.5; version=6.0 <6.9

Published CVSS scores

7.2Canonical Ltd.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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