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Not in CISA KEV
HIGH severity

GHSA-hhf9-qw4v-72xp

HIGHFix: canonical/lxd#18585

GHSA-hhf9-qw4v-72xp is a high-severity (CVSS 8.4) CWE-639 vulnerability. O3 Security confirms whether GHSA-hhf9-qw4v-72xp is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Broken Access Control in Canonical LXD DevLXD API

Published
Jun 26, 2026
Updated
Aug 12, 2026
Affected
0 pkgs
Patched
None yet
Exploits
None indexed
Exploitation data as of Aug 12, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

Broken Access Control in the devLXDInstancePatchHandler component of Canonical LXD allows an untrusted guest to mount, read, and overwrite another guest's custom storage volume via a crafted device PATCH request over /dev/lxd when security.devlxd.management.volumes is enabled.

Detection & mitigation playbook

Vulnerability
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for the affected component. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Remediation status

    No patched version of the affected component has shipped for GHSA-hhf9-qw4v-72xp yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-hhf9-qw4v-72xp is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-hhf9-qw4v-72xp. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Broken Access Control in the devLXDInstancePatchHandler component of Canonical LXD allows an untrusted guest to mount, read, and overwrite another guest's custom storage volume via a crafted device PATCH request over /dev/lxd when security.devlxd.management.volumes is enabled.
O3 Security · Impact-Aware SCA

Is GHSA-hhf9-qw4v-72xp in your dependencies?

O3 detects GHSA-hhf9-qw4v-72xp across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-hhf9-qw4v-72xp: Broken Access… | O3 Security