VulnSocial

CVE-2026-63300Patch(canonical / lxd)

LOWCVSS 9.9 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch canonical lxd systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_create_instances permissions on a restricted project to bypass project-level security restrictions. When migrating an instance between projects, LXD fails to validate the instance's configuration against the target project's enforced restrictions (such as restricted.containers.lowlevel, restricted.devices.*, and restricted.networks.access). An attacker can exploit this by creating a disallowed or high-privilege instance in an unrestricted project and subsequently moving it into the restricted project.

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0.5/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Weakness type (CWE)
CWE-862

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • lxd

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
canonical
Products
lxd

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-16: 1Patch / Workaround · 2026-09-16: 1Technical Details · 2026-09-16: 109-16
Signal classification1 categories
Patch
1100.0%
Full discourse1 post
  • DFIR Lab@DFIR_Lab
    Patch

    🚨 CRITICAL: CVE-2026-63300 in LXD (CVSS 9.9) Authenticated attackers can bypass project security restrictions via instance migration, escalating to high-privilege access. Affected: LXD instance management Patch immediately. #CVE #Vulnerability #PatchNow https://t.co/8Qecfv6dLc

    Post summary

    The post reports a critical LXD vulnerability, CVE-2026-63300, with technical impact details and a direct instruction to patch immediately. No PoC, exploit code, active exploitation, or debunking claim is indicated.

    0000040
    138 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appcanonicallxd---

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