CVE-2026-9640 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-9640HIGH

Canonical LXD — LXD Snapshot Import Privilege Escalation Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   H   N  U  H  H  H    7.2   .0037   29.8     —

AFFECTED
  Product  Versions  Fixed
  LXD      5.21.0 –  —

TIMELINE
  May 26  Reserved by canonical
  Jun 26  EXPLOIT PUBLISHED — CVE-2026-9640 (Canonical LXD). Public exploit reference added.
  Jun 26  Published (CNA: canonical)

CWE-863 · CNA: canonical · CVSS v3.1 · 4 references · NVD status: Analyzed

Description

A privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.. An authenticated project operator in a restricted multi-tenant environment can bypass policy restrictions by importing a maliciously crafted instance backup containing restricted configuration keys within a snapshot. When the snapshot is restored, these restricted keys are applied to the live instance without policy validation. Starting the modified instance grants the operator unauthorized host root access.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 26, 2026	Reserved	Reserved by canonical
June 26, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-9640 (Canonical LXD). Public exploit reference added.
June 26, 2026	Published	Published (CNA: canonical)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Canonical	LXD	—	5.21.0	—

Weaknesses

CWE-863

References (4)

https://github.com/canonical/lxd/pull/18301 [Issue Tracking, Patch]
https://github.com/canonical/lxd/pull/18303 [Issue Tracking, Patch]
https://github.com/canonical/lxd/pull/18304 [Issue Tracking, Patch]
https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552 [Exploit]

Authoritative record: CVE-2026-9640 at cve.org

Vendors: canonical

Weaknesses: CWE-863

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-9640 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.